From players getting COVID-19 vaccinations to relaxed coronavirus protocols to lineup issues, particularly at quarterback, the NFL faces a multitude of questions as training camps open.

FILE - In this Dec. 2, 2018, file photo, Pittsburgh Steelers center Maurkice Pouncey, right, and his brother, Los Angeles Chargers center Mike Pouncey pose after playing against each other in an NFL football game in Pittsburgh. (AP Photo/Don Wright, File)PITTSBURGH – Mike and Maurkice Pouncey came into the world together. “To my big brother Mike Pouncey thank you for always pushing me to be the best,” Maurkice Pouncey posted on Instagram. AdPlaying with a mix of athleticism and ferocity, Maurkice Pouncey developed a reputation as one of the league's most potent blockers. Mike Pouncey was limited to five games in 2019 and didn't play at all in 2020 after undergoing hip surgery in September.