The Tampa Bay Rays will kick off their series with the Seattle Mariners tonight at 10:10 p.m. The Rays will send Alex Cobb  (8-3, 2.82 ERA) versus the Seattle Mariners Hisashi Iwakuma  (5-10, 4.68 ERA).
Since he was acquired David DeJesus  has led off against right handed pitchers and Delmon Young  was signed to DH versus left handed pitchers but with Mariners right hander Hisashi Iwakuma  on the mound Joe Maddon  has Desmond Jennings  leading off and Delmon Young  at DH. David DeJesus  is not in the lineup.
Rays Lineup: Desmond Jennings  (CF), Ben Zobrist  (2b), Evan Longoria  (3b), Matt Joyce (LF), Delmon Young  (DH), James Loney  (1b), Wil Myers  (RF), Jose Molina  (C), and Yunel Escobar  (SS)
The reason for adding the two right handers to the lineups can be found in the reverse splits of Iwakuma. In his brief major league career he has held left handed hitters to a .225 average .225 (140 for 621) and an OPS (on-base% + slugging%) of .641. Right handed hitters have fared slightly better hitting .244 (137 for 562) and an OPS of .713.
The split has been more pronounced in 2013. Iwakuma has held left handed hitters to an average of .214 (85 for 397) and an OPS of .597. Right handed hitters have an average against him of .246 (55 for 224) with an OPS of .716.
Mariners Lineup: Brad Miller  (SS), Franklin Gutierrez  (RF), Kyle Seager  (3b), Kendrys Morales  (DH), Raul Ibanez  (LF), Justin Smoak  (1b), Mike Zunino  (C), Dustin Ackley  (CF), Nick Franklin  (2b),