Urschel announced Thursday that he would retire from professional football, Jamison Hensley of ESPN.com reports.

EDGE Analysis

The 26-year-old reportedly informed Ravens coach John Harbaugh of his intentions Friday morning, hours before the first full-team practice of training camp. Urschel, who had been in line to compete for starting duties at center, didn't release a statement on why he was stepping away from the game, but Hensley noted that his decision may have been motivated by a medical study released two days ago that found 99 percent of deceased NFL players' brains had shown signs of chronic traumatic encephalopathy (CTE), a condition linked to repeated brain trauma. Urschel, who had previously suffered a concussion in August 2015 that knocked him unconscious, is expected to turn his focus from the gridiron to the field of mathematics; he had been pursing a doctorate degree at Massachusetts Institute of Technology during the offseason.

Urschel will be available for Sunday's game against the Raiders.

EDGE Analysis

Urschel was forced to miss the Ravens' Week 3 win over the Jaguars due to the shoulder issue, but he'll return Sunday to provide depth on the offensive line.

Urschel (shoulder) is questionable to play in the Ravens' Week 4 matchup with Oakland.

EDGE Analysis

Urschel missed last week's game due to his shoulder injury and is still up in the air to play. With fellow guard Alex Lewis (concussion) also questionable, Urschel could see a spot start if he's able to play.

Urschel (shoulder) will sit out Sunday's game against the Jaguars, Jamison Hensley of ESPN reports.

EDGE Analysis

Urschel practiced in full on both Wednesday and Thursday, giving the impression that he would be ready to go for Sunday's game, but something must have complicated his status throughout the week.

Urschel (shoulder) is listed as questionable for Sunday's game.

EDGE Analysis

Urschel practiced in full this week which gives the impression that he could be closer to playing than sitting out.

Urschel (shoulder) practiced in full Thursday.

EDGE Analysis

Urschel was a full participant at Baltimore's practice for the second consecutive day which all but points to the notion that he'll be ready for Sunday's game.

Urschel (shoulder) is inactive for Sunday's game against the Browns.

EDGE Analysis

Urschel's status for Week 2 was uncertain heading into the weekend, but he has officially been ruled out even after being a full participant in practice throughout the week. He'll continue to serve as a depth option on the offensive line moving forward, with his next chance to suit up coming Week 3 against the Jaguars.

Urschel (shoulder) is questionable for Sunday's game against the Browns, Nate Ulrich of the Akron Beacon Journal reports.

EDGE Analysis

Urshel was a full participant in all of the Ravens' practices this week, which makes it a bit surprising he was listed as questionable. Even if activated, he likely won't play unless an injury to a starter forces him onto the field.

Head coach John Harbaugh said Urschel (shoulder) is healthy to play, Jeff Zrebiec of the Baltimore Sun reports.

EDGE Analysis

Despite this vote of confidence in Urschel's health, it appears Baltimore will continue to operate with rookie Alex Lewis at left guard. However, it's unclear whether Urschel will be reassigned to another position along the Ravens' offensive line, considering how the versatile Penn State product had finished the 2015 campaign as the team's starting center.

Urschel (concussion) was a full practice participant Wednesday or Thursday.

EDGE Analysis

Three weeks removed from suffering a concussion, Urschel is on track to play Week 1 against the Bills. He's listed atop the depth chart, but there's been some chatter that rookie Alex Lewis could push for the starting left guard job.