Lane Johnson, one of the most decorated offensive linemen of his generation, announced his retirement Tuesday, ending a 14-season career with the Philadelphia Eagles just four games into what was to be his latest season.

The announcement came two days after Johnson was a surprise inactive for Philadelphia's Week 4 game against the Los Angeles Rams, a move that fueled speculation before he confirmed the decision himself, as detailed in ESPN's report on his retirement.

Johnson, the No. 4 overall pick in the 2013 NFL Draft, leaves the game with six Pro Bowl selections, two first-team All-Pro honors, three second-team All-Pro nods, three Super Bowl appearances and two Lombardi Trophies. He started all 171 games he played across 14 seasons, including 15 postseason starts over nine playoff appearances.

RIGHT NOW, IT IS CRITICAL THAT I FOCUS ON MY MENTAL HEALTH.

"Right now, it is critical that I focus on my mental health. I owe it to my teammates, coaches, the organization and the fans to have my head and heart 100 percent in the game," Johnson said in his statement, adding that he had initially hoped to "gut it out for one more year" before concluding that "my personal and family priorities in my life have changed."

A Hall of Fame Case

Johnson has long been an outspoken advocate for mental health awareness in the NFL, a cause he continued to champion even as he stepped away from the sport that made him famous. Eagles owner and CEO Jeffrey Lurie called him "an all-time Eagle and one of the best players ever to play his position," and predicted Johnson is headed for the Pro Football Hall of Fame, according to NFL.com's coverage of the announcement. Former Eagles offensive line coach Jeff Stoutland, who coached Johnson for most of his career, called him "extremely rare."

The timing leaves Philadelphia's offensive line in disarray. Guard Landon Dickerson is on injured reserve, center Cam Jurgens is in the concussion protocol, and tackle Fred Johnson is out with a knee injury. Rookie Markel Bell started in Johnson's place against the Rams, according to Yahoo Sports' breakdown of the roster fallout, leaving coach Nick Sirianni to rebuild a unit that anchored two Super Bowl runs almost overnight.

Johnson's exit adds to a brutal stretch for Philadelphia's roster through the first month of the season, and the Eagles have not yet named a long-term plan at right tackle. For now, the team says it will lean on in-house depth while it evaluates options ahead of the trade deadline.