COLUMBIA -- Judging by South Carolina's second day of preseason camp, you would've thought the Gamecocks adopted gold as one of their team colors.

Yellow non-contact jerseys were a fashion statement Wednesday. Most of the injuries were hamstring tweaks, related to dehydration and cramping from the first practice.

Among those suffering from bad hammies: running back Kenny Miles, cornerback Chris Culliver, tight end Justice Cunningham and linebackers Shaq Wilson and Qua Gilchrist.

None of the injuries are considered serious, but all were worth having the players sit.

Some, such as Gilchrist and Wilson, did light warmup work. None participated in the late-practice team sessions.

"Hamstrings are funny things," defensive head coach Ellis Johnson said. "Some kids will take two days, some will take six. There's no indication when we'll get them back, but they're not extremely serious."

Johnson speculated that players might not be hydrating themselves enough before practice, and that's why they're running into issues with cramping and hamstring pulls.

Unrelated, but receiver Alshon Jeffery missed his second day of practice. He is recovering from having wisdom teeth removed. Left tackle Jarriel King is also nursing a hamstring pull, but his came Monday during a conditioning drill.

Guard Rok Watkins returned from an illness and worked some with the first-team offensive line.

Practice highlights

Freshman receiver Ace Sanders had another good day motoring around in the team sessions, the 7-on-7 and 11-on-11 portions of practice. He continues to show his jets off.

Quarterback Stephen Garcia made a note of Sanders' quickness.

Cornerback Stephon Gilmore made a nice move to pick off an out-route pass from Andrew Clifford.

Garcia was more accurate Wednesday in the team periods, but most of the throws were underneath, inside 10 yards. Tight end Pat DiMarco, running with the first-team offense, made a couple of nice grabs.

Running back Marcus Lattimore had trouble holding onto the ball during the 11-on-11 session, fumbling twice. That's one area some say Lattimore needs to improve in.

Defensive end Cliff Matthews was standing up some, rushing from the outside. Johnson said that's part of the plan to usher Matthews into the "Eric Norwood role."

Extra points

Head coach Steve Spurrier didn't speak Wednesday. He plans to talk, roughly, every other day during camp, USC officials said. During the fall, he won't speak on Mondays after games, instead waiting for his Tuesday news conference. ... Spurrier did allow Garcia to speak Wednesday. He's kept his QB on a pretty tight leash in the past.