Julio Rodriguez, the Seattle center fielder placed on the seven-day injured list July 3 with a concussion, is projected to return Saturday against the San Francisco Giants. Rodriguez was struck by a ball in the back of the head July 2 in a 1-0 win over the Los Angeles Angels.

He participated in pregame drills, ran bases, and took swings off a pitching machine Friday. General manager Justin Hollander said: "It's been a couple of weeks... I would be hopeful that he'll be ready to go tomorrow, but I don't know that, and we'll just see how he feels after the full pregame today."

Victor Robles started in center and batted eighth Friday. The three-time All-Star Rodriguez played a career-high 160 games last season. In 87 games this year, he's hitting .259 with 15 doubles, 14 home runs, 40 RBIs and 12 stolen bases.

Meanwhile, All-Star utilityman Brendan Donovan began a rehab assignment for Triple-A Tacoma Friday. Donovan, on the 10-day IL since May with a left groin strain, went 0-for-3 with three strikeouts and a walk in an Arizona Complex League game Wednesday.