In his first at-bat of Tuesday's game against the Miami Marlins, Upton hit a two-run single but reportedly tweaked his hamstring when he rounded first base. He stayed in the game and advanced from first to third on a single by Miguel Montero before eventually scoring on a sacrafice fly.
Instead of returning to right field in the top of the second inning, Upton was replaced in the game by Gerado Parra. The Diamondbacks said Upton left the game with tightness in his left hamstring and he is considered to be day-to-day.
The 24-year-old right fielder is hitting .273 on the season with nine home runs and 49 RBI. Upton has played in 114 of the Diamondbacks 123 games this season.
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