We’ve now reached the true halfway point of the season and the best teams in both leagues have continued to pull away from the pack. It’s looking like the Wild Card teams in both leagues will need to win around 95 games to ensure their playoff spot. That’s a lot of ground to make up for the squads that are well off that pace and the group of teams on the bubble has started to shrink as teams start to drop out of contention.

A quick refresher: my approach takes the three most important components of a team — their offense (wRC+), and their starting rotation and bullpen (50%/50% FIP- and RA9-) — and combines them to create an overall team quality metric. I add in a factor for “luck” — adjusting based on a team’s expected win-loss record — to produce a power ranking.

The top tier grew after the Padres, Rays, and Astros had really strong weeks. The six teams that make up this tier each have a run differential of at least +77 and hold a commanding grip on a playoff spot.

After holding the best record in baseball for the last few weeks, the Giants finally moved into the top spot in these rankings. They swept the Angels in a two-game series early last week and won their series against their Bay Area rivals over the weekend. They’ve won 10 of their last 12 games and have scored 6.9 runs per game during this hot stretch. With a Rays-esque roster that’s incredibly flexible and a fantastic rotation led by Kevin Gausman and Anthony DeSclafani, they’ve proven their success this year is no fluke. Read the rest of this entry »

The biggest storyline in baseball this week was the announced crackdown on pitchers using foreign substances on the mound. It’s still too soon to tell how this might change the results on the field, but the early research suggests it could have wide reaching effects. Scoring is up in June league-wide, but that may be the normal result of warmer weather.

A quick refresher: my approach takes the three most important components of a team — their offense (wRC+) and their starting rotation and bullpen (50%/50% FIP- and RA9-) — and combines them to create an overall team quality metric. I add in a factor for “luck” — adjusting based on a team’s expected win-loss record — to produce a power ranking.

The Dodgers have finally reclaimed the top spot in these rankings by winning 10 of their last 12. They’re about to get a lot healthier, too; Max Muncy and Cody Bellinger should be activated from the IL this coming week, and Corey Seager could start a rehab assignment as early as next weekend. That’s good, because their upcoming schedule is tough, with series against the Padres, Cubs, and Giants on the docket.

The Giants’ offense was absolutely dominant last week, beneficiaries of playing the Diamondbacks and Phillies at home; they scored 59 runs in seven games with Brandon Belt and Mike Yastrzemski leading the way. Those two combined to collect 18 hits last week, including eleven extra-base hits and five home runs. But one of the biggest reasons for San Francisco’s continued success has been the vast improvement of its bullpen. At the end of April, Giants relievers had the second worst park- and league-adjusted FIP in baseball. Since that point, they’ve lowered their FIP- to 98 and their ERA- to 81.

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After last week’s games, we’re around 40% of the way through the season. The halfway mark is quickly approaching, with the All-Star game soon after that. The form of the playoff races is slowly taking shape. And with few exceptions, too many of the teams on the bubble of contention just aren’t making any headway in the standings. There’s still plenty of season left to play, but the trade deadline decision-making point for many of these teams is coming sooner rather than later.

A quick refresher: my approach takes the three most important components of a team — their offense (wRC+), and their starting rotation and bullpen (50%/50% FIP- and RA9-) — and combines them to create an overall team quality metric. I add in a factor for “luck” — adjusting based on a team’s expected win-loss record — to produce a power ranking.

Despite neither team moving at all in the rankings, this tier saw the biggest changes this week. Both the White Sox and the Rays continued to pull away from the rest of the field in the American League, with each team losing just once last week. These two powerhouses are set to play three games in Chicago, which should be a fantastic preview of a potential AL Championship Series.

Chicago and Tampa Bay have scored the exact same number of runs this season but the White Sox have a decided advantage when it comes to their starting rotation. If the season ended today, their starters would have the third lowest park- and league-adjusted ERA of any team since the mound was lowered in 1969. And all this despite some significant struggles on the part of their staff ace, Lucas Giolito. They’ve thrived despite some extremely unfortunate injuries — Nick Madrigal is the latest victim — because they’ve built the best run prevention unit in the American League. Read the rest of this entry »

After a week hiatus, the FanGraphs Power Rankings return. We’re two months into the season and the best teams in the rankings have started to pull away from the pack while a large group of teams have congregated in the middle. These teams are on the bubble between viewing themselves as contenders and deciding to retool for next year by selling at the trade deadline.

A quick refresher: my approach takes the three most important components of a team — their offense (wRC+), and their starting rotation and bullpen (50%/50% FIP- and RA9-) — and combines them to create an overall team quality metric. I add in a factor for “luck” — adjusting based on a team’s expected win-loss record — to produce a power ranking.

The top tier stays big, as the top three teams from each league have put some distance between themselves and their competition.

In the National League, the top trio happens to all be battling for the NL West division crown, too. After getting swept by the Dodgers at home two weeks ago, the Giants have won nine of their last 11 games, including taking revenge against the Dodgers a week ago and recording a big series win over the Cubs. They’ve “pulled away” from the Padres by opening up a two-game lead in the division, though the loss of Evan Longoria won’t help their cause. Read the rest of this entry »

Injuries continue to wreak havoc on nearly every team in baseball. With the shortened season still close in the rear-view mirror and the realignment and delayed start to the minor leagues, teams have had to scramble to fill their major league rosters. Some teams have been able to weather these issues with extraordinary depth while others have been forced to scrape the bottom of the barrel to find replacements for their injured regulars.

A quick refresher: my approach takes the three most important components of a team — their offense (wRC+), and their starting rotation and bullpen (50%/50% FIP- and RA9-) — and combines them to create an overall team quality metric. I add in a factor for “luck” — adjusting based on a team’s expected win-loss record — to produce a power ranking.

The top tier got a lot bigger this week. The Red Sox continued to play well last week but the White Sox stumbled a bit. They were swept in New York over the weekend and won just two of their six games. The real reason this tier has grown so large is because the other three teams are playing out of their minds right now. The Rays, Padres, and Dodgers have won 10, nine, and six games straight, respectively. Read the rest of this entry »

We’re now a quarter of the way through the season and the biggest storyline has been the remarkable parity throughout baseball. A few pre-season favorites have continued to disappoint and some early season surprises have proven they’re for real, but with the standings so bunched up, anything could still happen. No team is on pace to win more than 100 games right now, and there are a gaggle of teams sitting just below or just above .500. With more teams sitting on the bubble between holding fast and selling, it should make for a dramatic summer.

A quick refresher: my approach takes the three most important components of a team — their offense (wRC+), and their starting rotation and bullpen (50%/50% FIP- and RA9-) — and combines them to create an overall team quality metric. I add in a factor for “luck” — adjusting based on a team’s expected win-loss record — to produce a power ranking.

These two teams barely budged in the rankings this week. The White Sox crushed the Twins in a three-game series and then split a four-game set with the Royals that ended with a wild, walk-off win on Sunday. They now possess the best record in baseball backed by the best run differential in baseball. The concerns about how their offense and defense will perform without Luis Robert are still present — Billy Hamilton has been nearly as good in the field though definitely not with the bat. They’ll need to lean on their fantastic pitching staff even more to carry them through the season. Read the rest of this entry »

After three weeks of these rankings and plenty of feedback — both positive and constructive — I’ve decided to change the way pitching factors into overall team quality. I had been using FIP to assess pitching performance, but using only peripherals undervalued some teams who were actually quite good at preventing runs and overvalued other teams who couldn’t keep runs off the board despite good pitching fundamentals. So instead of using straight park- and league-adjusted FIP as the pitching metric, I’ll be using a straight 50/50 split of FIP and RA9- beginning this week. This gives us a way to evaluate a team’s pitching staff with a blend of actual run prevention (including teams who may or may not benefit from good defense) and pitching talent. This 50/50 composite is shown below as SP- and RP-. The rest of the factors remain the same — offense is represented by wRC+ and combined with the two pitching factors to create an overall team quality metric. Then a team’s expected win-loss record (“luck”) is factored in to produce a power ranking.

There’s a new team on top of the rankings this week. Despite losing Luis Robert for months on Sunday, the White Sox rose to the highest spot in the rankings after allowing just five total runs to score last week. Their starting rotation has been the best in baseball by a wide margin — the runs allowed by Lucas Giolito on Sunday were the first a White Sox starter had allowed in a week. There are certainly some concerns about their outfield, with two of their young stars now out for extended periods of time. Read the rest of this entry »

One month down, five more to go! The final week in April saw the top teams in the American League and National League fall back towards the pack. The standings are pretty compact around the middle, which is as much an indicator of parity as it is a reflection of a wild month of baseball. Scoring is down. Pitching is dominant. Here’s the third week of the FanGraphs Power Rankings.

A quick refresher: my approach takes the three most important components of a team — their offense (wRC+), their starting rotation (SP FIP-), and their bullpen (RP FIP-) — and combines them to create an overall team quality metric. I add in a factor for “luck” — adjusting based on a team’s expected win-loss record — to produce a power ranking. Since we’re so early in the season, teams can move up and down the rankings pretty dramatically if they have a particularly good or bad week. Read the rest of this entry »

Another week of the 2021 season is in the books and it was a wild one. The A’s finally lost a game, the Reds couldn’t win one, and the Dodgers and Padres played playoff-esque baseball in a drama-filled four-game series over the weekend. Here’s the second week of the FanGraphs Power Rankings.

A quick refresher: my approach takes the three most important components of a team — their offense (wRC+), their starting rotation (SP FIP-), and their bullpen (RP FIP-) — and combines them to create an overall team quality metric. I add in a factor for “luck” — adjusting based on a team’s expected win-loss record — to produce a power ranking. Since we’re so early in the season, teams will move up and down the rankings pretty dramatically if they have a particularly good or bad week.

The same two teams sit atop the rankings but they’ve switched positions. Neither team had an outstanding week — both teams split a series against the Mariners but the Dodgers lost their four-game set against the Padres after a wild Sunday night game that went to 11 innings.

The Red Sox now have the best offense in baseball and Eduardo Rodriguez has turned in two fantastic starts to help their rotation gain ground in the rankings. After developing a case of myocarditis — an inflammation of the heart muscle — brought on by contracting COVID-19, there was no way to know what to expect from Rodriguez this season but he’s picked up right where he left off after his breakout season in 2019. Read the rest of this entry »

Welcome to the first week of the FanGraphs Power Rankings. Nearly every major sports site has some form of power rankings; It’s a fun way to think about all 30 teams in baseball and stack them up against each other outside of the rigid structures of leagues and divisions. But where most sites use a panel of experts to build their power rankings — experts who may or may not be simply using their gut feeling to rank teams — I wanted to build an approach to power rankings that was a little more data driven.

My approach basically boils down to taking the three most important components of a team — their offense (wRC+), their starting rotation (SP FIP-), and their bullpen (RP FIP-) — and weighting and adjusting to create an overall team quality metric. I played around with trying to include defense in some form, but adding UZR or DRS or defensive efficiency never really made the team quality metric any more accurate. To test my comprehensive team metric, I used 2020 data to see how it correlated with each team’s win percentage at the halfway mark and their final record. The correlation coefficient at the middle of the season was .68 with an r-squared of .47, and at the end of the season, those marks improved to .80 and .63, respectively.

The final piece of the puzzle was to add in a factor for recent performance while also adjusting for “luck.” Teams with good records should be rewarded, but if they came by those wins in an unsustainable fashion, they shouldn’t receive the full weight of them. Likewise for teams who lost games they might have been expected to win. Put this overall team quality metric together with a team’s adjusted win percentage and you get a solid power ranking formula. And unlike most other sites, I’ll present these power rankings in tiers because the differences between many of these teams, particularly in the middle, isn’t that big. Read the rest of this entry »