Rickie Weeks (hammy) placed on DL

SAN FRANCISCO -- Another difficult day in a season full of them for the Milwaukee Brewers ended in familiar fashion: with another loss and another player on the disabled list.

Second baseman Rickie Weeks took a flight back to Milwaukee before the Brewers lost 4-1 at San Francisco on Thursday. He was scheduled to get an MRI exam on his injured left hamstring, which landed him on the 15-day disabled list.

Thr team recalled Scooter Gennett from Triple-A Nashville in a corresponding move.

"It's too bad," Roenicke said. "Because when you have nice ballgames and you're playing OK, you want to enjoy them. But it seems like there's something that always comes up."

Weeks injured his hamstring when he stumbled over his bat and fell trying to beat out an infield grounder in the eighth inning of Milwaukee's 6-1 win Wednesday night. Roenicke and assistant athletic trainer Dave Yeager helped Weeks limp back to the dugout while he winced in pain.

Weeks is batting .209 with 10 home runs and 24 RBIs this season. While he said he'd never had a hamstring injury before, Weeks is the fourth Milwaukee player -- but first non-pitcher -- to go on the disabled list with a hamstring injury this year.

Jim Henderson missed two weeks in late May and early June with a strained right hamstring, Marco Estrada missed two months with a strained left hamstring suffered June 3 and Yovani Gallardo is on the DL with a strained left hamstring.

"When you start having the same injury for pitchers and regulars, all the injuries are a concern, but the same ones -- especially being a muscle -- that's what they're concerned about," Roenicke said. "Some guy runs into a wall and he breaks a hand or he gets hit by a ball and breaks a hand, you can't do anything about that. The hamstrings, the quads, the obliques, those are the things you hope with training you can limit those."

Jeff Bianchi played second and batted sixth Thursday. He finished 0 for 2 with a walk, though the rest of the lineup didn't fare much in the finale at San Francisco.

Milwaukee hopes it can get some relief at second base -- and around the diamond -- when it travels to Seattle for the first time since 1997.

The Brewers had just optioned Gennett to Nashville on Tuesday night to make room for Estrada, who started Wednesday. Players usually must spend at least 10 days in the minors before they are eligible to return. But if a teammate is placed on the disabled list, that restriction can be waived.

Roenicke said the team was not ready to announce the return of slugger Aramis Ramirez, who is on the disabled list with left patellar tendinitis. Ramirez had run the bases Wednesday and declared himself fit to return.

"He feels like he's ready to go," Roenicke said. "Whether that's (Friday), whether that's Tuesday (at Texas), whether that's Saturday or Sunday, I don't know. But he's ready to go."

Information from The Associated Press was used in this report.