Making the jump from college to the NFL isn't easy.
Even for a player selected with the No. 4 overall pick in the draft.
After a slow start, Johnson began to gain traction in a huge win at Oakland in Week 9 when quarterback Nick Foles tossed seven touchdown passes.
"Raiders was probably my best game," Johnson told Phillymag.com. "I just felt like every play I did was really good. I just feel like I extended my game there and knew I had the ability and just tried to carry it on through the rest of the season. [The coaches] said, 'You're progressing really well. Just keep on working on it.' Just my hand usage I think was on another level that game. So they just wanted to see that more the rest of the season."
Johnson weighed about 310 pounds last season and Phillymag.com noted he gained five to 10 pounds in preparation for his second season.
Johnson is definitely ready for what lies ahead in 2014.
"Just getting comfortable in the offense," Johnson said. "Coming from college where you've been playing in a certain scheme for four years, you've got it down pat. You feel confident. The main thing was just kind of getting used to the offense and getting my confidence up to where you know you can do certain things. So confidence was a big boost.
"I'm trying to be a dominant player. I know I have the ability. It's just a matter of being consistent with it because there's times where I showed flashes of being a really good player, and then there's other times where I didn't. So I'm just trying to be more consistent this year."