Dr. James Andrews, whom the Patriots hired as an independent physician, also did not give Gronkowski clearance to play as of Friday. Andrews did not operate on Gronkowski.
Gronkowski has been practicing for several weeks but has not played this season.
---San Diego Chargers running back Ryan Mathews is probable for Monday night's game against the Indianapolis Colts, according to the San Diego Union-Tribune.
Mathews sustained a concussion last Sunday night against the Oakland Raiders. He was held out of practice Thursday and had not been cleared to play at that point. Apparently, he has improved in the last 48 hours.
"I'm looking forward to seeing him out there," coach Mike McCoy said Saturday.
Matthews has 67 rushes for 234 yards this season.
---New York Jets cornerback Antonio Cromartie is expected to play Sunday against the Pittsburgh Steelers even though he is listed as questionable with a knee injury, according to ESPN.
Cromartie did not practice Friday, a day after hyperextending a knee. Coach Rex Ryan said Cromartie's playing status would be a game-time decision.
The injury occured during a portion of Thursday's practice not viewed by the media. Cromartie said it was a non-contact injury. Ryan said the team was initially concerned that the injury was serious but an MRI later revealed only a hyperextension.
Cromartie, a two-time Pro Bowler -- including last season -- has not missed a game due to injury in three-plus seasons with the Jets.
---The Cleveland Browns officially placed quarterback Brian Hoyer on injured reserve on Saturday.
To fill Hoyer's spot on the roster, the team signed rookie wide receiver Charles Johnson from the Green Bay Packers' practice squad.
Hoyer tore an ACL in his right knee Oct. 3 against the Buffalo Bills. He was replaced by Brandon Weeden, who will start Sunday against the Detroit Lions.
Weeden and Jason Campbell are the only quarterbacks on the Browns' roster.
Johnson was a seventh-round pick of the Packers in this year's draft out of Grand Valley State. He was waived Aug. 31 and signed to their practice squad Sept. 2.
---The Kansas City Chiefs officially placed rookie tight end Travis Kelce on injured reserve on Saturday.
Kelce, 24, had microfracture knee surgery this week.
Kansas City took Kelce in the third round of the draft out of Cincinnati.
To fill Kelce's spot on the roster, the Chiefs promoted rookie safety Bradley McDougald from their practice squad. McDougald, out of Kansas, has played two games but has spent the majority of the season on the practice squad.
---The Seattle Seahawks announced Saturday that they released center Jason Spitz and signed wide receiver Bryan Walters from the practice squad.
Spitz signed with Seattle on Sept. 25 but did not play in the last two games.
Walters originally signed with the San Diego Chargers as an undrafted rookie free agent in 2010. He sent time on the practice squad that year and played four games in 2011. He had three catches for 27 yards and eight punt returns for 45 yards. He spent part of last year on the Minnesota Vikings' practice squad before joining Seattle's practice squad in December.
---The Indianapolis Colts announced Saturday that safety LaRon Landry and outside linebacker Bjoern Werner will not play Monday night's game at the San Diego Chargers.
Landry is out with an ankle injury and Werner has an injured foot.
Landry had 26 tackles in the first two games of the season but has not played since then. Delano Howell has played in place of Landry.