Michael Baron of “JustMets.net” tweeted:
#Mets are 4-8 when they don’t hit a home run so far in 2016. 16-4 when they do hit a home run.
— Michael Baron (@michaelgbaron) May 11, 2016
That results in a .467 winning percentage difference between when they DO homer (.800) and when they don’t (.333). Is that a record?
I used the Retrosheet gamelogs to determine the won-loss records of all teams from 1911-2015 given whether or not they homered in games. Here are the top five teams in terms of winning percentage differential in a given season.
| GAME WITH HR | GAME WITH NO HR | |||||||
| year | TEAM | WIN | LOSS | PCT | WIN | LOSS | PCT | DIFF |
| 1995 | LAN | 63 | 21 | .750 | 15 | 45 | .250 | .500 |
| 1918 | NY1 | 13 | 0 | 1.000 | 58 | 53 | .523 | .477 |
| 2009 | CHN | 72 | 35 | .673 | 11 | 43 | .204 | .469 |
| 2005 | CLE | 81 | 34 | .704 | 12 | 35 | .255 | .449 |
| 2004 | FLO | 64 | 26 | .711 | 19 | 53 | .264 | .447 |
If the Mets continued their winning percentages in both circumstances, they’d have the fourth-highest difference all-time, behind the strike-shortened 1995 season of the Dodgers (made playoffs), the war-shortened 1918 season of the New York Giants (finished 2nd in NL) and the 2009 Cubs (finished 2nd in NL Central, missed playoffs).