What's doubtful is that Rizzo made a big difference. Without Dalbec and Schwabs bats, we might have 2-3 more losses.
What's not doubtful is that the Yanks gave up more than we should have to get him. (To me, Gallo was the bigger get.)
The Yanks wwere something like 7-3 before the trade, so I'm not sure one can point to Rizzo in the dugout and clubhouse as the turning point.
We'll never know, and maybe who the Yanks gave up will not amount to squat, but we did the right thing, IMO.