I have him on 4 current teams. Check out this difference:
At Rogers Centre
2-1 15 Saves 2.15 ERA 1.01 WHIP
At Citizen's Bank
3-1 13 Saves 1.50 ERA 0.77 WHIP
At US Cellular
1-2 10 Saves 3.63 ERA 1.16 WHIP
And then on my Tour team (of course)
At US Cellular
0-3 4 Saves 9.97 ERA 2.02 WHIP