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6/4/2014 7:23 P.M. ET

Giants officially tab Cain's return for Friday

CINCINNATI -- Giants right-hander Matt Cain is "good to go" as the starter for Friday night's series opener against the New York Mets, manager Bruce Bochy said Wednesday.

Cain, 29, has apparently recovered from a strained right hamstring, which he sustained May 21 when he pitched three hitless innings at Colorado. That injury forced him onto the 15-day disabled list for the second time this season. He was sidelined in late April with a cut on the tip of his right index finger.

Having missed four starts during his stints on the DL, Cain is 1-3 with a 3.66 ERA in eight starts. He's 5-5 with a 3.57 ERA in 12 career starts against the Mets.

Cain continued his progress Wednesday by playing catch with Madison Bumgarner on flat ground.

Casilla progressing quickly in injury rehab

CINCINNATI -- Giants manager Bruce Bochy said Wednesday that right-hander Santiago Casilla, the team's top setup reliever, is ahead of schedule in his recovery from a strained right hamstring.

Bochy said Casilla has resumed running and throwing, though he hasn't practiced pitching off a mound yet. Nor has a date been set for that test, Bochy added. Casilla, 33, was expected to miss at least four weeks.

Responding to a question, Bochy said that Casilla, who hurt himself during an ill-advised sprint to first base May 21 at Colorado, will need to pitch a few games in a Minor League injury rehabilitation assignment before he can rejoin the Giants.

Casilla is 1-1 with a 1.37 ERA and one save in 22 appearances. Opponents are batting .205 off him.

Giants coach Dunston admires Hamilton's speed

CINCINNATI -- Giants assistant coach Shawon Dunston, who spent 18 seasons in the Major Leagues, remembered when virtually every team had a speedster on its roster.

Eric Davis. Juan Samuel. Marquis Grissom. Mookie Wilson. Tim Raines. Kenny Lofton. Even Ryne Sandberg, Dunston's Chicago Cubs teammate who was renowned for aspects of his game other than speed, stole 54 bases in 1985. That was Dunston's rookie year.

So when Reds center fielder Billy Hamilton generates attention with his fleet feet, Dunston doesn't get too excited, though he does appreciate the skill.

"I've seen it before," Dunston said.

After watching Hamilton steal two bases while driving the Giants nuts in Tuesday's series opener, Dunston was suitably impressed. Citing the rising prominence of Hamilton and Dodgers second baseman Dee Gordon, another extremely fast runner, Dunston said Wednesday, "It's nice to see the game come back to old-school habits."

Among the fastest runners Dunston has seen were St. Louis' Vince Coleman and Willie McGee ("You had to play the infield close -- you couldn't play regular depth"), Deion Sanders ("He'd hit a triple and look like he was jogging") and Willie Wilson ("He could pick 'em up and put 'em down. ... I think he could beat anybody.")

Giants left-hander Javier Lopez, who began his professional career in 1998, said Hamilton compared favorably with the fastest runners he has seen. He also mentioned Gordon, Darren Ford, who had his moments as a Giants pinch-runner, and performers such as Carl Crawford, Jacoby Ellsbury and Coco Crisp at the beginning of their careers.

"These guys aren't just a threat to steal second base, but also third," Lopez said. A pitcher, he said, must try to neutralize top runners by varying the pace of his deliveries to home plate -- releasing one pitch after his normal pause, for example, then waiting an extra second or two before throwing the next one. The problem that pitchers often encounter, Lopez said, is that "all of us tend to get into a rhythm."

Chris Haft is a reporter for MLB.com. Read his blog, Haft-Baked Ideas, and follow him on Twitter at @sfgiantsbeat. This story was not subject to the approval of Major League Baseball or its clubs.