SAN FRANCISCO -- As of pregame Wednesday, no decision had yet been made on Giants left-handed reliever Jeremy Affeldt, but Giants manager Bruce Bochy said the team hoped to make a decision prior to its upcoming road trip.

"He's not quite making the improvement we would like, or he would like, so we'll see how he's doing after the game and talk about his situation," Bochy said.

Affeldt has made one appearance since injuring his left hamstring May 23, but left that outing after retweaking it.

Bochy said placing Affeldt on the disabled list was a "possibility," and Affeldt said he'd be willing to go on the DL if that's what it took to get healthy.

"I want to get to where it's going to be sustainable for 4 1/2 months," Affeldt said. "I'd rather do that [go on the DL] than be out for a long time."

In other injury news, Bochy said infielder Emmanuel Burriss (left foot fracture) could be ready to play -- whether in the Majors or Minors -- around the All-Star break.

Burrell doing well at Triple-A Fresno

SAN FRANCISCO -- Giants manager Bruce Bochy said he's been getting solid reports about the progress of recently signed outfielder Pat Burrell, currently at Triple-A Fresno.

In three games with the Grizzlies, Burrell is 5-for-12 (.417) with one home run and four RBIs.

"From the first game he's looked good at the plate and has been playing some outfield," Bochy said of what he's heard of Burrell, who signed with the Giants on Saturday. "He kept himself in great shape and he showed up with great attitude and he's been playing well."

Burrell was slated to bat cleanup and play left field Wednesday night.

Giants closer Wilson racking up strikeouts

SAN FRANCISCO -- Though Brian Wilson still has a tendency to deliver ulcerating performances, he has become a more dominating closer statistically.

Wilson entered Wednesday with 33 strikeouts in 21 1/3 innings, an average of 13.92 per nine innings. That tops his averages of 10.33 last season and 9.67 in 2008, when he was named a National League All-Star.

Wilson attributed his prowess to experience and sheer repetition.

"Maybe the only thing different is the confidence and a few scenarios where you decide to throw to a certain location, based on what you think the hitter will do and his patterns," Wilson said. "Besides that, the fastball hasn't changed."

Wilson converted 12 of his first 13 save opportunities, the National League's second-best percentage (92.3), while recording a 2.11 ERA, also a career-best thus far.