One of my favorite post-deadline activities to do is to force ZiPS to act a bit like a time machine. Not the cool kind that goes back in history and saves James Garfield or into the future to see the dependable hoverboards that we were supposed to get in 2015, but to give a bottom-line estimate of how, based on projections, the trade deadline mixed up those playoff races.
To do this, I first start with the updated ZiPS projections as of the morning of August 1st, which includes my spin on the new depth charts. There’s some variation from the FanGraphs Depth Charts, but they tend to be in the same neighborhood given that the disagreements between playing-time predictions typically involve mostly fringe-type players; it’s not like one of us thinks Clayton Kershaw will start for the Dodgers and the other things they’ll release him or something.
Then, I “undo” every transaction made since June 15th, both reshuffling the depth charts as if the trades never happened and removing or adding the fractional wins that players have added to their new teams since those trades. Then… ZiPS-zap-zippity-zoop… out come the new projections and a bottom line of the changes in playoff odds. Let’s start with the American League with the bottom-line playoff improvements. (We’ll get into the divisions next.)
ZiPS Trade Deadline Improvements, Playoff Percentage Points
| Team |
Playoff+ |
| Seattle Mariners |
8.2% |
| Cleveland Indians |
0.5% |
| New York Yankees |
0.0% |
| Texas Rangers |
0.0% |
| Kansas City Royals |
0.0% |
| Detroit Tigers |
0.0% |
| Chicago White Sox |
0.0% |
| Boston Red Sox |
0.0% |
| Baltimore Orioles |
0.0% |
| Toronto Blue Jays |
0.0% |
| Houston Astros |
-0.2% |
| Minnesota Twins |
-0.5% |
| Los Angeles Angels |
-0.7% |
| Tampa Bay Rays |
-0.8% |
| Oakland A’s |
-6.5% |
The rather prosaic results here demonstrate just how relatively set the American League is in 2018. Four of the teams are nearly guaranteed playoff appearances: Boston, Cleveland, Houston, and New York. The fifth playoff spot essentially has only two real contenders in the Seattle Mariners and Oakland A’s. There are a few additional questions here, mainly whether the Yankees can catch the Red Sox or Seattle can shock Houston, but after those six teams, the odds of a seventh team becoming playoff-relevant down the stretch are very long. Sure, the Angels and Rays aren’t mathematically out of the hunt by any means — they both have something better than a Dumb and Dumber “So you’re saying there’s a chance?” probability — but even those two teams didn’t act like they believed it was anything more than pure moon shot.
ZiPS Projections, AL East, 8/1/18
| Team |
W |
L |
GB |
PCT |
DIV% |
WC% |
PLAYOFF% |
PreDIV |
PrePlayoff |
| Boston Red Sox |
107 |
55 |
— |
.660 |
76.6% |
23.4% |
100.0% |
77.5% |
100.0% |
| New York Yankees |
103 |
59 |
4 |
.636 |
23.4% |
76.6% |
100.0% |
22.5% |
99.9% |
| Tampa Bay Rays |
80 |
82 |
27 |
.494 |
0.0% |
0.2% |
0.2% |
0.0% |
1.0% |
| Toronto Blue Jays |
74 |
88 |
33 |
.457 |
0.0% |
0.0% |
0.0% |
0.0% |
0.0% |
| Baltimore Orioles |
52 |
110 |
55 |
.321 |
0.0% |
0.0% |
0.0% |
0.0% |
0.0% |
If you haven’t figured it out from the context, “PrePlayoff” represents the team’s playoff probability without any of the trades of the last six weeks.
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