In hopes of bolstering a depleted frontcourt, the Warriors worked out several free-agent centers Friday at Chase Center.

Hasheem Thabeet — a former No. 2 overall pick who last played in the NBA five years ago — was among the group, a league source confirmed with The Chronicle. Names of the other workout participants aren’t known.

“There’s been some thought,” Warriors head coach Steve Kerr said of adding another center. “We had a workout yesterday with a few guys. That’ll be decided sometime in the next few days. … We are in a tough spot at that center position — not just in terms of the season 2 ½ weeks from now, but just training camp.

“Positionally, you need multiple guys in each spot to be able to practice and run your drills. We’re in a little bit of a strange spot that we weren’t anticipating. We haven’t decided what we’re going to do, but we’ll see.”

The Warriors announced Monday that Willie Cauley-Stein, their projected starting center, would be out through at least the first four games of the regular season with a mid-foot strain. Kevon Looney (tweaked hamstring) and Alen Smailagic (rolled ankle) missed Saturday night’s preseason opener against the Lakers, leaving Omari Spellman — ideally a power forward — as the team’s starting center.

Marquese Chriss, a training-camp invitee who is unlikely to make the 15-man roster, will be Spellman’s primary backup. The Warriors can also play the undersized Draymond Green and Eric Paschall at center if necessary.

Thabeet, 32, whose participation Friday was first reported by AmicoHoops.net, has been trying to revive his NBA career for a while.

The No. 2 pick in the 2009 NBA Draft out of UConn, he lasted less than two seasons with Memphis before short-lived stints with Houston, Portland and Oklahoma City. Thabeet last played professionally for the Yokohama B-Corsairs of the Basketball Japan League in 2017-18, averaging 13.1 points, 8.4 rebounds and 2.3 blocks in 23.7 minutes per game.

Because the Warriors don’t have enough room under the hard cap to sign another player to the 15-man roster, they would have to waive someone — most likely forward Alfonzo McKinnie, whose contract is non-guaranteed until Jan. 10. They could also cut Ky Bowman or Damion Lee and give a player one of their two-way contracts, since two-way deals don’t count against the salary cap.

Connor Letourneau is a San Francisco Chronicle staff writer.