Keefe will undergo an arthroscopic procedure to repair a significant tear in a muscle as a result of a shoulder separation he experienced earlier this summer.
Keefe said he felt pain when he lifted weights this summer. When he returned to school recently he underwent an MRI that showed the tear.
It's expected that Keefe could be out for four to five months, which could make it November or December before he returned to action.
While it won't be decided now, the injury and recover could lead to Keefe redshirting this season. UCLA's frontcourt depth this upcoming season -- which will consist of Lorenzo Mata, Kevin Love, Luc Richard Mbah a Moute, Alfred Aboya and even Nikola Dragovic (if he can play some at the power forward spot) -- could maybe allow Keefe to redshirt.