well, sure. that home run added 12.8% chance of the mets winning the game, which is pretty darned good. the poor cards had but a scant 3.1% chance at that point, down from 15.9% after dom's single. the porblem is, that wasn't the only thing nimmo did as a batter that game. in the first inning, leading off the game, nimmo made the first out, dropping the mets' chance of winning by 2.1% in the third inning, nimmo again made an out, with one out already in the inning, with the score tied. this dropped the mets' chance of winning by 1.6% and in the 5th inning, nimmo made an out, again with the scored tied, with two outs and a runner on second. this dropped the mets' chance of winning by 4.5% and finally, leading off the eighth inning with the score still tied, nimmo got out a fourth time, dropping the mets' chance of winning the game another 4.3% so despite adding 12.8% chance of winning in his last at bat, prior to that point he had already reduced the emts' chance of winning the game by a full 12.3% his net WPA was a scant 0.002 or 0.2% (losing a tenth of a percentage point to pesky rounding errors). m.e.t.b.o.t. looks at a whole game in total, not a single play in isolation. he's remarkably comprehensive. context matters. he's also a connotation nerd, which usually surprises people. he's admittedly not good at factoring in defensive contributions. he always credits a batter with a fielder having made an error, as for the error to have occurred, the batter must usually have done something to precipitate the action. but he always wanted to take the blame for defensive miscues away from the pitchers, who, he would always argue, did their job by getting the batter to hit the ball to one of his fielders. so he'd try to dig into the numbers and pull out the WPA delta attributable to errors. where he really struggled was identifying where the pitcher failed to get the batter to hit the ball to his fielders, but one of the fielders did something incredible to get to the ball and make a play. he'd benefit mightily by plugging into the treasure trove of statcast data available, but as near as i can tell, it's not yet available to in any kind of format that's remotely machine readable by slapdash coagulations of mismatched plastic gears housed in a repurposed child's toy. but we can still hope.