New England Patriots tight end Rob Gronkowski pulled up with a possible injury while running a route during Monday’s joint practice with the Chicago Bears.

According to ESPN.com, Gronkowski took himself out after going for a pass from quarterback Tom Brady in 7-on-7 drills along the sideline. The severity of the injury was unknown.

Gronkowski, 27, walked to the sideline after the play and met with a trainer before heading to the lower practice field. After about 10 minutes there, he retreated to the locker room, ESPN reported.

The 6-foot-6, 265-pound Gronkowski, who had 72 catches for 1,176 yards and 11 touchdowns last season, takes a beating in the regular season, so he is likely to sit out the entire preseason in an effort to keep him fresh. He hasn’t played in a preseason game since 2012.

The Patriots and Bears will hold two more joint practices Tuesday and Wednesday ahead of their preseason game at Gillette Stadium on Thursday night.

Bucs sign Dotson to extension

Tampa Bay Buccaneers starting right tackle Demar Dotson received a three-year contract extension on Monday.

NFL Media’s Ian Rapoport reported the deal for the 30-year-old Dotson is worth approximately $6 million per season and runs through the 2019 season.

Signed as an undrafted free agent out of Southern Mississippi in 2009, Dotson started all 16 games during the 2013 and 2014 seasons before sustaining a torn MCL last summer. Dotson, who is 6-foot-9, 315 pounds, made three starts and played in just six contests in 2015. In seven seasons, he has played in 76 career games (52 starts).

Dotson’s role is a pivotal one as the Buccaneers look to continue with the development of former top overall pick Jameis Winston.

49ers QB out for season

Quarterback Thad Lewis is out for the season with a torn ACL, San Francisco 49ers coach Chip Kelly said Monday.

Lewis, a college free agent out of Duke in 2010, was hurt on a 1-yard run in the third quarter of Saturday’s preseason opener against the Houston Texans.

The 49ers’ No. 2 quarterback in the game, Lewis was 12 of 21 for a team-high 97 yards before being lifted for rookie Jeff Driskel.

The 49ers’ QB competition for the starting job pits Colin Kaepernick against Blaine Gabbert.

Bills sign Biermann

The Buffalo Bills signed veteran outside linebacker Kroy Biermann on Monday after IK Enemkpali tore his right ACL in Saturday night’s preseason opener.

Biermann’s deal is for one year, a source told ESPN’s Adam Schefter. Enemkpali was waived/injured to make room for Biermann.

The 30-year-old Biermann, who worked out Monday morning and signed a contract in the afternoon, has played his entire career for the Atlanta Falcons, who made him a fifth-round pick in the 2008 draft.

The 6-foot-3, 255-pound Biermann has played in 114 career games (37 starts) and has totaled 333 tackles, 23.5 sacks, two interceptions, six passes defensed, three forced fumbles and two fumble recoveries.

Lions sign Quarless despite suspension

The Detroit Lions signed free agent Andrew Quarless on Monday despite the tight end facing a two-game suspension for firing a gun in public.

Quarless, who played the previous six seasons with the Green Bay Packers (2010-15), was suspended under the league’s personal-conduct policy as a result of the incident in Miami Beach on July 4, 2015. He was sentenced to one year of probation and given a $1,000 fine after pleading no contest in November.

A fifth-round draft selection by the Packers in 2010 out of Penn State, Quarless recorded 89 receptions for 940 yards and six touchdowns in 60 games (27 starts). In eight postseason games (two starts), he totaled 10 receptions for 85 yards and one touchdown.

Broncos’ Walker sustains leg injury

Denver Broncos defensive end Vance Walker was carted off the field with a right leg injury on Monday.

Walker, who had just returned to practice from an ailing back, sustained an injury to his right leg during 7-on-7 drills and remained on the ground for several minutes as he was tended to by team trainers. The 29-year-old is expected to undergo an MRI exam to determine the severity of the injury.

Walker recorded 33 tackles and two sacks in 15 games last season for the Broncos. A seventh-round pick of the 2009 draft, Walker has collected 172 tackles and 12 sacks in 104 career games with Atlanta, Oakland, Kansas City and Denver.

Billings out with torn meniscus

Cincinnati Bengals rookie defensive tackle Andrew Billings underwent knee surgery on Monday to repair a torn meniscus and could miss the entire season, according to multiple reports.

Selected in the fourth round of the 2016 draft, Billings was carted off the field during a joint practice with Minnesota on Wednesday. The 6-foot-1, 311-pound Billings was expected to provide depth as a run stopper behind Geno Atkins for the Bengals, who still have Domata Peko, Marcus Hardison, Pat Sims, DeShawn Williams and Brandon Thompson on the roster.

Browns’ Gordon returns to practice

Cleveland Browns wide receiver Josh Gordon was activated from the non-football injury list Monday and returned to practice.

Gordon’s participation in practice was his first since December 2014. The 25-year-old had been reinstated from a one-year suspension on July 25, but a quad injury kept him on the sideline for an additional two weeks.

Gordon has run afoul from the NFL due to multiple violations of the league’s substance-abuse policy. He also will sit out the first four games of the upcoming season, although coach Hue Jackson told reporters that he has yet to decide if Gordon will play against Atlanta in Thursday’s preseason contest.

Gordon overcame a two-game suspension to record a league-leading 1,646 receiving yards during the 2013 season. He was banned for the initial 10 games of the 2014 campaign before serving a season-long suspension the following year.