LOS ANGELES (CBSLA) - Football teams at two Glendale Unified high schools will be asked to hold "virtual practices" after an unspecified number of positive COVID tests.

A school district spokesperson told CBSLA's Jeff Nguyen the Crescenta Valley High School frosh/soph and varsity football teams and the Hoover High School frosh/soph football team will "pivot to virtual practices for 10 days as a result of positive cases discovered during surveillance testing this week".

Crescenta Valley may resume in-person practice after March 13, while Hoover may return after March 14, the spokesperson said.

Jennifer Zimmer has a son who's a football player.

She works for the district but she's not on the faculty at Crescenta Valley – where the district isn't telling coaches or parents who tested positive.

"I know that privacy is part of any situation in a school environment. If it was my son, I wouldn't want that information disclosed," she said.

The results come on the heels of new youth sports guidelines that require weekly surveillance testing for high-contact sports, including football and water polo.