During training camp, DeVante Parker appeared he was ready to become the Dolphins No. 1 receiver this season, but he hasn’t played like thus far.

After recording 18 receptions in his first three games, Parker injured his ankle in the Dolphins’ Week 5 game against the Titans. Since his return, Parker hasn’t been the same player.

Dolphins offensive coordinator Clyde Christensen has a theory on why Parker hasn’t played well since his injury.

“He doesn’t have the edge that he had coming out of training camp,” Christensen said on Thursday. “But I do think that sometimes with those guys who are speed guys and outside guys you get a nagging thing, and you just don’t feel 100 percent. I’d say that that is the reason. There is still seven more games. We talked about it this morning, we have to get him right back to that level. He still could do some great things before this year is over and he could make it into a heck of a season.”

Since returning from his injury, Parker has caught 11 receptions for 142 yards and zero touchdowns. Parker is on pace to record just 53 receptions for 672 and two touchdowns, which would be down from his 2016 season (56 catches, 744 yards, and four touchdowns).

Parker is also averaging 12.6 yards per receptions, which would be the lowest of his career. In his three seasons in the NFL, Parker has yet to look like the first round pick the Dolphins expected when they drafted him 14th overall in 2015.

“I think a little bit of it is when you miss that time and you are kind of away from that group, you miss some value in the reps, game experience, those type of things,” Dolphins head coach Gase said on Thursday. What where we were at before he got injured, we were relying on him heavily, with a lot of different situations. Some of it we never got to it…I think him coming back he is trying to figure out what’s my role. The offense has changed throughout the season, and guys started to getting a flow and guys are starting getting better at certain things that they do, and he is starting to feel his way out a bit.”