The Los Angeles Dodgers' difficult April got a lot worse with news that two-time All-Star shortstop and 2016 NL Rookie of the Year Corey Seager will undergo season-ending Tommy John surgery. Dodgers manager Dave Roberts said the operation will be performed Friday in Los Angeles to repair a right ulnar collateral ligament sprain. Seager spoke to reporters in the dugout before the Dodgers played NL West rival Arizona on Monday night.