Athlete health

Cleveland Browns defensive end Myles Garrett (95) hits Pittsburgh Steelers quarterback Mason Rudolph (2) with a helmet during the second half of an NFL football game Thursday, Nov. 14, 2019, in Cleveland. (Joshua Gunter/Cleveland.com via AP)

Los Angeles Rams quarterback Jared Goff calls signals during the first half of an NFL football game against the Pittsburgh Steelers in Pittsburgh, Sunday, Nov. 10, 2019. (AP Photo/Keith Srakocic)

Baltimore Ravens quarterback Lamar Jackson (8) celebrates his touchdown during the second half of NFL football game against the Cincinnati Bengals, Sunday, Nov. 10, 2019, in Cincinnati. (AP Photo/Frank Victores)

FILE - In this Oct. 11, 2018, file photo, former NFL football quarterback Colin Kaepernick smiles on stage during W.E.B. Du Bois Medal ceremonies at Harvard University, in Cambridge, Mass. Kaepernick plans to audition for NFL teams on Saturday, Nov. 16, 2019, in a private workout arranged by the league to be held in Atlanta. (AP Photo/Steven Senne, File)

Graphic shows NFL team matchups and predicts the winners in Week 11 action; 3c x 4 1/8 inches; 146 mm x 104 mm;

FILE - In this June 11, 2019, file photo, New New York Jets general manager Joe Douglas, center, poses for a picture with head coach Adam Gase, left, and Jets chairman and CEO Christopher Johnson during a news conference at the team's NFL football training facility in Florham Park, N.J. Johnson says Gase's job is safe and he will remain the coach next season despite the team's struggles this year. Johnson held a brief meeting with reporters and says Gase has his trust as well as the trust of general manager Joe Douglas moving forward. (AP Photo/Seth Wenig, File)

San Francisco 49ers quarterback Jimmy Garoppolo, left, avoids being sacked by Seattle Seahawks defensive end Jadeveon Clowney (90) during the second half of an NFL football game in Santa Clara, Calif., Monday, Nov. 11, 2019. (AP Photo/Tony Avelar)

FILE - In this Feb. 4, 2018, file photo, Philadelphia Eagles head coach Doug Pederson, right, talks to Nick Foles during the first half of the NFL Super Bowl 52 football game against the New England Patriots, in Minneapolis. Facing the mighty New England Patriots on the NFL's biggest stage, Philadelphia Eagles coach Doug Pederson's decision to try a trick play _ the "Philly Special" _ on a fourth down late in the first half of Super Bowl 52 will be remembered as one of the gutsiest calls in sports history. That signature moment between Foles and Pederson standing on the sideline discussing the play was turned into a bronze statue that sits outside the team's stadium as a reminder of the greatest play in franchise history. (AP Photo/Matt York, File)

In this photo released by Villarreal Club de Futbol on Tuesday, Oct. 15, 2019, Giuseppe Rossi laces up his sneakers during a training with Spanish club Villarreal, Spain. The 32-year old Rossi, the American-born striker who played for the Italian national team before a series of injuries slowed his career, is back at Villarreal, the Spanish club where he thrived in his prime. (Villareal F.C via AP)

Baltimore Ravens quarterback Lamar Jackson (8) runs the ball for a touchdown during the second half of NFL football game against the Cincinnati Bengals, Sunday, Nov. 10, 2019, in Cincinnati. (AP Photo/Gary Landers)