looking for a guy with harden stuff from both sides is a bit too much to ask for, imo. what about a guy who throws like randy wolf (healthy) lefty and shields righty. so righty you get:
12 wins, 170 k's, 200 ip, 3.90 era, 1.15 whip. lefty:
10 wins, 150 k's, 180 ip, 4.20 era, 1.25 whip.
combined, thats 22 wins, 320 k's, 380 ip, 4.04 era, 1.20 whip. not spectacular, but gold considering you get the production from just 1 player.
of course that would never happen. a ML team would likely make the pitcher just use one arm to get as advanced as possible. like when teams tell a switch hitter to only hit from one side (the sox did this with hanley)