BALTIMORE -- Brett Anderson may not have had the results he was looking for in his first Triple-A rehab start on Thursday night, but the left-hander's outing was still a step in the right direction in the eyes of A's manager Bob Melvin.

Anderson, who underwent Tommy John surgery last July, allowed four runs on seven hits in four innings for Sacramento, but Melvin was encouraged by the reports.

"You look at the numbers and they weren't great, but what we're looking for at this point is how he feels afterward," Melvin said. "And he feels great today. So that's kind of the first step."

Melvin said Anderson touched 93 mph on the radar gun, a surprisingly high figure in just Anderson's second rehab start, during which he threw 53 pitches.

"I was surprised he actually hit 93," Melvin said. "Your first couple of times out, there's always that reluctance to really let it go. I know he's a guy that throws in the mid-90s, so I was pleasantly surprised to hear that the velocity was up to that point."

Much more significant to Melvin, though, was that Anderson was feeling well.

The lefty is scheduled to throw a bullpen this week and then make another rehab start, although a specific timetable has not been laid out.

Worth noting

• Dallas Braden faced hitters for the first time since undergoing shoulder surgery last May, throwing a 20-pitch live batting practice at the A's facility in Arizona on Friday.

• Shortstop Cliff Pennington's visit with a doctor on Thursday yielded no significant findings, Melvin said. Pennington has been feeling better but is yet to begin baseball activity. He was placed on the disabled list July 20 due to left elbow tendinitis.

• Melvin said he is in favor of expanding the use of instant replay to make boundary calls and determine whether a ball was trapped or caught. Major League Baseball Commissioner Bud Selig expressed confidence Friday that instant replay would be expanded in the future to include such calls.

"Boundary calls certainly are significant, usually because those are plays that are extra bases, which a lot of times means a run scored or not," Melvin said. "I think everybody was looking for some sort of a tweak, and it sounds to me like it was the right thing to do."