White went 0-1 with an 8.27 ERA in 24 relief appearances with the Yankees this season. He produced a sterling 2.13 ERA in his first 15 games of the season, but in a pair of appearances on 5/15 vs Seattle and 6/11 vs San Diego allowed 11 earned runs in 3.0 innings. His overall ERA without those 2 outings drops to 4.08.
Well there you go.
Perhaps, but there is a great chance he will be an improvement. Alone however this won't make a difference.