Warriors agree to 2-year contract with Glenn Robinson III

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The Warriors have agreed to sign forward Glenn Robinson III to a two-year contract, with a player option on his second year, league sources have confirmed with The Chronicle.

The Athletic was first to report the news.

Robinson, 25, provides the Warriors much-needed wing depth. With Kevin Durant gone and Klay Thompson expected to miss the start of the season with an ACL injury, Golden State entered Tuesday with Alfonzo McKinnie and Jacob Evans as its only wings.

The Warriors are facing a numbers crunch as they near the hard cap, so they might need Robinson to open 2019-20 as their starting small forward. Last season with the Pistons, Robinson appeared in 47 games (18 starts), averaging 4.2 points and 1.5 rebounds in 13 minutes.

Robinson became an unrestricted free agent after Detroit declined its team option on him. With news Tuesday that Robinson and center Willie Cauley-Stein had agreed to terms, Golden State appears poised for a full-on youth movement. Nine of the 13 players currently projected on the 2019-20 roster are 25 or younger.

The Warriors are expected to waive or trade point guard Shaun Livingston, who will only be owed $2 million of his $7.7 million contract if he is cut before July 10. NBA teams can hold as many as 15 players on their regular-season roster.

Connor Letourneau is a San Francisco Chronicle staff writer. Email: cletourneau@sfchronicle.com. Twitter: @Con_Chron