He got nicked up in 2019 too. And he was clearly playing to protect himself at times in 2019.
Lewis had a hyperextended knee against South Carolina early in 2019. Apparently played through it but still had a pretty good year. From the Alabama team site:
Redshirt Junior (2019)
Selected to the All-SEC second team by the league coaches ... tied for fifth among SEC defenders with 11.5 tackles for loss (-53 yards) ... finished ninth in the conference with six sacks (-40 yards) ... added a team-high 16 quarterback pressures to go with his 31 total tackles ... also contributed two pass breakups and a fumble recovery to his season totals ... selected to the Butkus Award Watch List ... named one of the Alabama coaching staff’s defensive players of the week for his play at Texas A&M and against Tennessee and Arkansas.
Duke: Came off the bench to record three total tackles, including a sack (-8 yards) ... provided consistent pressure off the edge to force the Blue Devils into a 12-for-22 day passing that included a pair of interceptions.
New Mexico State: Pressured the Aggie quarterback twice and added two tackles, including one for loss (-2 yards) in the home opener.
South Carolina: Totaled a team-high two quarterback pressures to go with one tackle for loss (-5 yards).
Ole Miss: Notched his second sack of the season (-5 yards) and added a pass breakup in the matchup with the Rebels.
Texas A&M: Led all Tide defenders with a career-high two sacks (-7 yards), part of his three tackles on the afternoon ... added a pair of quarterback pressures and was credited with five hurries by the Tide coaching staff ... earned defensive player of the week accolades from the UA coaches for his play in College Station.
Tennessee: Selected as a defensive player of the week by the Alabama coaches for his career day against the Vols ... totaled seven tackles, including three for loss (-21 yards) and two sacks (-20) ... provided pressure off the edge to help limit the UT offense to only 117 yards passing.
Arkansas: Earned defensive player of the week recognition from the UA coaching staff for a second consecutive week after another impressive performance ... affected the Razorback quarterback all night, recording a career-high six quarterback pressure to go with a pass breakup and three total tackles ... played a key role in forcing the Hogs’ passers into an 11-of-26 night that included three interceptions.
LSU:Matched his career-high for tackles with seven stops, including half a tackle for loss (-1 yard) ... also pressured the Tigers’ quarterback a team-high three times while adding a fumble recovery that he returned two yards.
Mississippi State: Finished with three tackles in Starkville, including one for loss (-3 yards).
Western Carolina: Saw time against the Catamounts but did not record any stats.
Auburn: Made one stop in the Tiger backfield, forcing a one-yard loss.
Michigan: Elected to sit out the Citrus Bowl.