Jaylen Brown hyperextended his knee and will not play Tuesday night for the Boston Celtics' summer league entry, according to reporters with the team in Utah.

Jaylen Brown hyperextended his knee and is out tonight. — Adam Himmelsbach (@AdamHimmelsbach) July 5, 2016

Shrewsberry said Brown's right knee not a serious issue. Abdul Nader will see more time tonight as a result. — Mark Murphy (@Murf56) July 5, 2016

Jaylen Brown (knee) won't play tonight. He's day to day. #Celticstalk — A. Sherrod Blakely (@ASherrodblakely) July 5, 2016

In other injury news, tests on Jordan Mickey's sore left shoulder came back negative, according to the Boston Herald's Mark Murphy. The big man could potentially rejoin the Celtics in time for the Las Vegas summer league, which opens July 9.

Brown impressed during his summer league debut Monday night -- especially while drawing fouls on attempted dunks -- but the team will likely be cautious with him moving forward. It's not wise to further risk the No. 3 overall pick's health during summer league action, but Brown is apparently expected to play Thursday after missing just one game. That could add to the viewing excitement because, well...

Micah Shrewsberry said when Jaylen Brown gets a step on people at practice Walter McCarty yells "ON YO HEAD!" — Adam Himmelsbach (@AdamHimmelsbach) July 5, 2016

For some written reaction to Boston's summer league opener, click here. For some further discussion, listen to the latest episode of the Locked on Celtics podcast with the Rainin' Js, which can be found below: