ST. LOUIS -- Spurred by last week's home-plate collision that sidelined Buster Posey for the season, Giants manager Bruce Bochy renewed his call for rules that would protect catchers from being mauled by baserunners.

Bochy said Wednesday that he unsuccessfully tried to reach Joe Torre, Major League Baseball's vice president of baseball operations, to discuss the matter. Bochy indicated that he won't let the matter rest until he speaks to Torre, whose responsibilities include rule enforcement.

Bochy proposed reserving an area around home plate where a catcher can situate himself without fear of being steamrollered by an incoming runner. He compared the situation to a punt returner in football being hit by a tackler after calling for a fair catch.

Last Wednesday, Posey moved in front of home plate to take a throw from Nate Schierholtz before Florida's Scott Cousins plowed into him. Posey sustained a fracture in his lower left leg and torn ankle ligaments that required surgery.

"We're close to somebody getting hit in the neck area and getting paralyzed," Bochy said. "These guys coming in hard, that's part of the game. I was a catcher. I've been hit. Believe me, I know that."

But, Bochy added, catchers have become too vulnerable, particularly since baserunners have become faster and stronger and can hit a defender with greater force than ever.

"It's time that we do tweak this a little bit and protect these guys," Bochy said.

Admitting the obvious -- that Posey's misfortune profoundly upset him -- Bochy added that he remained haunted by the memory of a 2003 collision in which his Padres catcher, Gary Bennett, was pulverized at home by Brian Jordan of the Dodgers, a former NFL defensive back.

"I thought [Bennett] was paralyzed," Bochy said.

DeRosa committed to comeback attempt

ST. LOUIS -- Utility man Mark DeRosa rejoined the Giants on Wednesday, intent as ever on continuing to play.

"I'm not giving up yet," DeRosa insisted. "I'm going to do something productive for this Giants organization."

DeRosa recently visited the Cleveland Clinic to consult Dr. Thomas Graham, who confirmed that the 36-year-old had completely torn the ECU tendon in his left wrist. This actually was good news for DeRosa, whose wrist ailments have limited him to 44 games as a Giant since the start of the 2010 season.

DeRosa, who plans on discussing a rehabilitation plan with club management and medical officials, said that he feels pain-free for one simple reason.

"There's nothing to hurt anymore," he said.

DeRosa feared the worst before meeting with Graham, who operated on his wrist last July.

"I didn't want the guy to tell me that I had to retire," DeRosa said.

The 11-year veteran also figuratively held his breath during a brief break with his family at his home in suburban Atlanta. The Giants were shuffling personnel at the time, creating the possibility that they might open up a roster spot by transferring DeRosa from the 15-day to the 60-day disabled list. But he stayed on the 15-day DL and is technically eligible to be activated Thursday, though he'll remain sidelined for at least a couple of weeks.

DeRosa will begin his latest comeback with diminished expectations.

"I don't expect to be the everyday guy I was, but I expect to be a good player again," he said, acknowledging that he'll probably have to use a smaller, lighter bat.

"I realize that I'm not going to be able to drive the ball as I once did," said DeRosa, who averaged 17 home runs, 30 doubles and 78 RBIs per season from 2006-09.

Worth noting

Pablo Sandoval took pregame batting practice and appeared ready for an injury rehabilitation assignment. The switch-hitting third baseman, who's recovering from surgery to remove a fractured hamate bone from his right hand, took approximately 20 swings from each side of the plate and homered twice on both sides. Manager Bruce Bochy has said that Sandoval could begin a rehab stint as early as Friday. ... Bochy said that first baseman Brandon Belt, who was hit by a pitch on his left wrist Tuesday, was improving steadily but remained on day-to-day playing status. ... Jeremy Affeldt's two perfect innings Tuesday represented his longest outing of the season.