Lee (10-8, 3.26 ERA): He's look to rebound from a rough stretch. Lee has lost three straight starts with a 9.33 ERA (19 ER/18.1 IP) in that span. He's seen his season ERA go from 2.57 to 3.26 because of it. Still, his ERA is 10th in the American League and his 179 2/3 innings pitched are 10th-most in the AL. Lee has 156 strikeouts and 12 walks, a ridiculous 13.00 strikeout-to-walk ratio, well ahead of the competition (Roy Halladay is second at 7.44). Lee went just five innings and gave up five runs on seven hits with a walk and five strikeouts in his last outing, a loss to Minnesota. He is 2-5 with a 4.50 ERA in 10 starts since he was traded to Texas. Lee is 12-5 with a 4.28 ERA in 22 career starts against the Royals. He hasn't pitched against them this season.
O'Sullivan (2-4, 4.96 ERA): Acquired in the trade that sent Alberto Callaspo to the Angels, O'Sullivan has gone 1-4 with a 6.00 ERA in seven games (six starts) for Kansas City. He's coming off his second quality start as a Royal, giving up three runs (all in the second inning) on seven hits with no walks in seven innings in a win over Detroit. O'Sullivan got the no-decision when the Royals won in extra innings. He has faced the Rangers three times (two starts) while with Los Angeles this season and is 2-0 with a 2.70 ERA (in 13 1/3 innings pitched).
Hitters: Only four Rangers hitters have at least five at-bats against O'Sullivan with mixed results. Michael Young and David Murphy are each 2-for-5. Julio Borbon and Elvis Andrus are a combined 0-for-11. Jason Kendall (3-for-8) and Alex Gordon (3-for-9) have had success against Lee. Yuniesky Bentancourt (3-for-17) and Mike Aviles (2-for-15) have struggled versus the lefty.