By TERESA M. WALKER and BARRY WILNER AP Pro Football Writers

(AP/CBS) — NFL Commissioner Roger Goodell has warned the league’s 32 teams of penalties including potential forfeits of games for violations of COVID-19 protocols that force changes in the regular-season schedule.

In a memo sent to the teams Monday after a conference call involving NFL and club executives, Goodell reiterated the need to adhere fully to all of the league’s health and safety guidelines.

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“Protocol violations that result in virus spread requiring adjustments to the schedule or otherwise impacting other teams will result in additional financial and competitive discipline, including the adjustment or loss of draft choices or even the forfeit of a game,” Goodell wrote in the memo obtained by The Associated Press.

“Simply put, compliance is mandatory. Now is the time to recommit ourselves to our protocols and best practices for the duration of the season.”

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The NFL was forced to reschedule Sunday’s game between the Steelers and Titans when Tennessee had the league’s first coronavirus outbreak, which has affected 20 organization members, including 10 players. That game was moved to Week 7, causing adjustments that also impacted the Baltimore Ravens.

New England’s game at Kansas City was moved from Sunday to Monday night after Patriots quarterback Cam Newton tested positive for COVID-19. The league has reportedly already started an investigation into the Patriots over Newton’s positive test.

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(© Copyright 2020 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)