"We won't know the extent of what we're looking at until after the surgery," Kerr said, prior to the Warriors taking on the Thunder in Oklahoma City.
The injury occurred during the second quarter of Golden State's win over the Rockets on Saturday, when Wiseman went up for a dunk and landed awkwardly after being blocked by Houston forward Kenyon Martin Jr.
Kerr said the Warriors spoke to several medical experts to determine the best course of action for Wiseman's injury.
"He puts on a brave face," Kerr said of Wiseman, the No. 2 overall pick in the 2020 NBA draft. "Obviously, we saw him [Tuesday] at practice and had a chance to visit with him, and he's in relatively good spirits, but he's putting on a brave face for sure. He's a young guy -- this isn't supposed to happen so early in someone's career. So it's a tough time for sure. So fingers are crossed, and we'll see how everything goes [Thursday]."
Wiseman, 20, is averaging 11.8 points and 5.8 rebounds in 21.4 minutes this season.