According to Adam Caplan of ESPN, the Eagles reportedly signed Johnson to a five-year extension Friday. Eliot Shorr-Parks of NJ Advance Media also reported the deal was agreed to. The team announced the deal later in the day.
Mike Garafolo of FoxSports.com noted the terms of the deal:
Johnson, 25, has emerged as a core piece of Philadelphia's offensive line over the past three seasons. In fact, Johnson has appeared in all 44 games he's been eligible for despite encountering some bumps and bruises along the way.
However, he missed four games at the start of the 2014 season due to a performance-enhancing drug suspension before embarking on a full 16-game slate in 2015.
"Johnson was the Eagles' best offensive lineman last season, playing both tackle positions," Shorr-Parks wrote. "Johnson showing he can play both the left and right side increases his value, and it could only go up if Johnson is asked to protect the quarterback's blindside full-time last season, should the team let [go] of Jason Peters."
When Peters went down with a back injury during the 2015 season, Johnson shifted from right tackle to left tackle and held his own protecting quarterback Sam Bradford's blindside.
Johnson even acknowledged he had hopes of succeeding Peters as the team's long-term solution at left tackle once the 34-year-old leaves the nest.
"I think that's what they drafted me for," Johnson said Friday, per Dave Zangaro of CSN.
If there's one thing Johnson needs to correct, it's some of his penalty issues. According to Pro-Football-Reference.com, Johnson was flagged 13 times during the 2015 season. Considering he was flagged 15 times over his first two seasons combined, that spike cannot be ignored.
But by and large, Johnson has been as advertised since the Eagles tabbed him as a cornerstone of their offensive line in 2013.
Light on his feet with strong hands and the ability to spring running backs for big gains at the second level, Johnson figures to be a staple of Philadelphia's core under head coach Doug Pederson for quite some time.