Adrian Peterson says he stayed in shape and was ready when the Tennessee Titans called him.

(AP Photo/Charles Krupa)NASHVILLE, Tenn. – NFL Commissioner Roger Goodell is warning the league's 32 teams of penalties including potential forfeits of games for violations of COVID-19 protocols that force changes in the 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. “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. Victory Monday.”The negative test results returned Sunday included New Orleans Saints fullback Michael Burton, who falsely tested positive on Saturday. The Saints learned of the positive test after leaving New Orleans for Sunday’s scheduled game in Detroit and ran another series of tests on players and staff overnight.

Nissan Stadium, home of the Tennessee Titans, is shown Tuesday, Sept. 29, 2020, in Nashville, Tenn. The Titans suspended in-person activities through Friday after the NFL says three Titans players and five personnel tested positive for the coronavirus, becoming the first COVID-19 outbreak of the NFL season in Week 4. The Titans' outbreak is now at 20 cases, with 18 positive tests returned since Tuesday with the addition of Blasingame to the COVID-19/Reserve list on Monday. Sunday marked the sixth straight day that at least one member of the Titans’ organization has had a positive test result return. After the NFL postponed the Titans' game set for Sunday against Pittsburgh, the league rescheduled it for Week 7 on Oct. 25 during Tennessee's bye.