After brutal June and July performances, Josh Hamilton has performed well in the first few weeks of August, hitting .320/.382/.580 in 55 trips to the plate. According to both Hamilton and his coaches, the improvement is the direct result of his willingness to finally make adjustments in terms of which pitches to swing at. After months of hacking away at pitches well out of the strike zone, he’s finally learned his lesson.

“I’m just making my mind up that I’m going to try to focus better on taking more pitches and getting in better hitter’s counts,” Hamilton said. “You see the difference. My third at-bat, I struck out. He didn’t throw me a strike. I asked the umpire, ‘Did he throw any strikes?’ He said, ‘No.’ That was the difference, being patient and getting in good hitter’s counts and knowing that if they’re pitching it there, you can hit it instead of trying to make something happen. Just take your base and score runs.”

He’s definitely saying the right things, and his recent performance is a dramatic improvement. So, is Hamilton really becoming more selective?

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On Tuesday, Tampa Bay activated Evan Longoria from the disabled list; they haven’t lost since. This correlation between Longoria’s return and the team’s six game winning streak seems a bit flukey when you see his .261/.308/.304 line since coming off the DL and note that the’s not healthy enough to play the field yet, so he’s not producing any defensive value either. However, Longoria’s return has produced something of a chain reaction that has helped the team run off six straight victories, and bodes well for their ability to stay in contention down the stretch.

With Longoria manning the DH spot, the Rays had to find a spot to put Jeff Keppinger, who has quietly been one of the Rays best offensive weapons this year. Since he’s a lousy glove guy, it’s easier to hide him at third base than second base, so they installed Keppinger at third and shifted Ryan Roberts over to second base. That closes off second base for Ben Zobrist, so over the weekend, Joe Maddon decided to give Zobrist another shot at shortstop, playing him on the left side of second base for the first time since 2009.

It’s an idea that the Rays should probably stick with, as Elliot Johnson and Sean Rodriguez have been offensive black holes that have dragged the team down all year. Zobrist isn’t a classic shortstop, but defensive metrics have loved his work at second base over the last four years, and it’s unlikely that he’s capable of being a terrific defensive second baseman while being completely unable to handle shortstop. He might not be a great defender there, but the offensive upgrade that is created by opening up a line-up spot for either Keppinger or Roberts in lieu of Johnson or Rodriguez is substantial.

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Via Yahooo’s Jeff Passan:

While Mike Rizzo wouldn’t pin down a number, he said Stephen Strasburg will not exceed 180 innings.

— Jeff Passan (@JeffPassan) August 10, 2012

While the Nationals have been saying publicly for a while that they were going to take precautions with Stephen Strasburg, this is the firmest comment yet on just where the line is going to be drawn. The team shut down Jordan Zimmermann after 160 innings last year, so that had been where most guesses were falling, but it sounds like Strasburg will get to make two or three more starts than his teammate did a year ago.

Just doing the basic math, Strasburg is at 127 innings right now, leaving him 53 innings before he gets to 180. Strasburg is averaging 5.8 innings per start, so on his current trajectory, that would leave him with nine more starts this season. The Nationals have 50 games remaining on their schedule, so sticking with a five man rotation and not skipping the 5th starter would leave each member of the rotation with 10 more turns. Without alteration, this limit would essentially take Strasburg to the final week of the regular season, and he’d simply skip his final regular season start and watch the playoffs as a spectator.

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When Doug Fister broke into the big leagues, he was a soft-tossing, pitch-to-contact change-up artist, who threw strikes with mediocre stuff and projected as a back-of-the-rotation innings eater or a bullpen guy. He wasn’t bad, but the lack of a quality breaking ball and his reliance on his change as an out-pitch meant that he didn’t have anything to strike out right-handed batters with, and he wasn’t generating as many groundballs as you’d expect from a 6’8 guy with good command. Over his first year and change in the big leagues in 2009-2010, he was basically the definition of average, running a 102 ERA-/99 FIP-/99 xFIP- in 232 innings. He limited walks and avoided home runs, so he looked like any member of the Twins rotation over the prior 10 years. Nothing wrong with that, but certainly not a lot of upside beyond strike-throwing middle-of-the-rotation guy.

Then, last year, Fister began to change. His velocity picked up, and instead of topping out at 91-92, he started hitting 93-94 with regularity. By the end of 2011, his average fastball was over 90 mph, up two full ticks over his 2010 average. At the same time, he began to rely less on his fastball/change-up combo, and increased his breaking ball usage, especially against right-handed batters. The increased velocity and pitch mix led to a spike in his strikeout rate, which jumped from 12.9% to 16.7%. In fact, he ended the year with a 28% strikeout rate in September, looking nothing like the pitch-to-contact guy who showed up a few years earlier.

This year, the velocity has regressed back to previous norms — perhaps due to a costochondral strain that landed him on the DL twice — but the strikeout rate has still taken yet another leap forward. Once again, Fister has reduced his reliance on his fastball, and now he’s featuring his curve ball more than ever before. In his start against the Yankees yesterday, he snapped 25 curveballs, 15 of which went for strikes. This big bending curve has now become his #2 pitch, and its effectiveness has been the driving force beyond his second drastic increase in strikeout rate.

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After last night’s victory over the Mariners, the Orioles announced they were calling up top prospect Manny Machado from Double-A and giving him the third base job for the stretch run. Wilson Betemit hasn’t been a total disaster, posting a 100 wRC+ in 356 plate appearances, but he’s one of the worst defensive players in baseball and is dreadful against lefties, so moving him into a 1B/DH platoon isn’t a bad use of his skills.

The promotion is still a bit of a surprise, however, as Machado is a teenager whose numbers in Double-A don’t suggest that he’s ready to start hitting Major League pitching right away. A .266/.352/.438 line isn’t all that different from what Betemit is doing, and of course Machado is posting that line against inferior pitching. But, despite the mediocre looking slash line, there are reasons to think that Machado might be more ready for the big leagues than the raw numbers suggest.

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The Brewers current rotation might be the most fascinating group in baseball at the moment. With Chris Narveson and Shaun Marcum on the DL and Zack Greinke in Anaheim, the team has had to turn to three unproven big league starters to fill out their rotation – Mike Fiers, Marco Estrada, and Mark Rogers. Generally, when you move a guy from the bullpen to the rotation and call up two kids from the minors, the results aren’t great, but Fiers, Estrada, and Rogers have been fantastic, and the team hasn’t seen a real drop-off by going with the kids.

Fiers has gotten the most attention, as he’s run off nine straight starts with at least six innings pitched while allowing two runs or fewer, posting a 1.03 ERA over that 61 inning stretch. And, certainly, Fiers story deserves to be told, especially considering his 88 mph fastball and general lack of pedigree as any kind of top prospect. His eye-popping 5/1 K/BB ratio without big time stuff has made him a central topic of discussion, and rightfully so. However, when I was looking at the list of guys who have posted similar statistical seasons to Fiers, I couldn’t help but notice that Estrada was on that list too.

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Last night, Yu Darvish took the mound against the Red Sox, and not surprisingly, he racked up a lot of walks and strikeouts. This is a common trend for Darvish, who has ended 39.6% of opposing plate appearances with a walk, hit batter, or a strikeout. Darvish is the kind of pitcher who succeeds or fails on his own, relying less on his defense than just about any other pitcher in the sport.

It’s not unusual for guys with premium stuff — which Darvish definitely has — to struggle with command early in their careers. However, as Bill Petti showed back in May, normal aging curves for starting pitchers don’t show a drastic improvement in command. Is it any different with high walk, high strikeout guys who simply need to learn to harness their stuff? Or, to put it another way, have other Darvish-like starting figured out how to throw strikes and take advantage of their velocity and movement?

To look at this, I applied the new filters available on the leaderboard to restrict the list to guys who matched three variables – walk rate, strikeout rate, and fastball velocity. Since we’re relying on velocity as an input, that means we can only look back to 2002, so our sample is smaller but we’re more likely to get a better match in terms of stuff, so that’s a trade-off I’m willing to make. To come up with a list of guys who have had similar seasons to what Darvish is having now, I filtered using a minimum of 100 IP, 12% BB%, 20% K%, and FBv of 91.0 mph. While Darvish is well above the 20% strikeout mark, we do want to account for the fact that strikeout rate has been trending upwards, and so slightly lower K% in prior years were similar in terms of difference to league average. The list of names who match those inputs aren’t all that flattering.

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Over the weekend, I had the pleasure of attending the Saber Seminar in Boston, an event put on by Chuck Korb and Dan Brooks to help raise money for The Jimmy Fund, and the event was wildly successful in that regard, raising close to $20,000 for cancer research and care.

The event was also successful from a baseball perspective, as there were a number of interesting presentations and discussions. I was asked to be part of the final panel on Sunday, and was tasked with talking about something relating to “The Future of Sabermetrics”. While most panels on this topic at various conferences over the last few years have focused on things like Field F/x and ball/player tracking technology that may never become public, I decided to talk about an area where I think those of us who are interested in researching the game have not put enough effort into understanding – the driving factors behind changes in attendance.

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