MLB trade rumors: Phillies deal for Jay Bruce ‘is complete’ The Padres surprised many be including him on their Opening Day roster, opting not to throttle his MLB service time, and Tatis justified that decision immediately, slashing .300/.360/.550 in his first 100 at-bats and .333/.385/.500 as the leadoff hitter.The combined line of the other five Padres who have batted leadoff: .222/.287/.379. Related News Rookie phenom Fernando Tatis Jr., out since April 28 with a left hamstring injury, will begin a rehab assignment Monday at Double-A Amarillo. If all goes well, the San Diego Union-Tribune reported, the star shortstop could be back atop the Padres’ lineup by the end of the week.Rated MLB Pipeline’s No. 2 prospect, Tatis, 20, led the Padres in almost every offensive category when he was sidelined. Joey Gallo injury update: Rangers outfielder (oblique) placed on 10-day IL Tatis was excellent defensively and on the basepaths, too, the Union-Tribune noted, showcasing the five tools that make him the Padres’ clear shortstop of the future. In Tatis’ absence, key offseason acquisition Manny Machado moved from third to short seamlessly.Still, the Padres have not only missed Tatis’ presence atop their lineup, but also have searched for answers at third while getting little production from the leadoff spot. Tatis has been at extended spring training in Arizona in recent weeks, slowly working his way into game action. Manager Andy Green has offered no timeline on Tatis’ rehab stint (per MLB.com). “How quickly he returns will be dictated by how he performs and how he feels,” Green said over the weekend.The Padres could use the young star as soon as possible. They are 2-5 over their last seven games and just lost two of three at home to the NL-worst Marlins to fall to 30-29 and into third place in the NL West, 10 1/2 games behind the first-place Dodgers.