For most of his career, Calvin Johnson has known one position coach.

Kippy Brown was the Detroit Lions’ receivers coach in 2007, but as a rookie, Johnson gravitated toward a young assistant not too far removed from his playing days: Shawn Jefferson.

Jefferson was promoted to receivers coach the following year, and he stayed in that position, helping mold Johnson into one the NFL’s most dangerous pass catchers. His contract wasn’t renewed by Lions coach Jim Schwartz in January.

Tight ends coach Tim Lappano took over as receivers coach this off-season, and Johnson said he’s still getting accustomed to a new voice in the wide receivers room.

“At first, I was a little uneasy about it, just because I’ve been with Shawn my whole career,” Johnson said Monday. “But Tim’s done a great job so far. I don’t know if Tim’s been talking to Shawn or whatever, but Tim’s come out here with some good drills for us, as far as focusing our eyes on the ball and getting our footwork right. So Tim, he’s on top of it.”

With Lappano’s help, Johnson said he’s out to top 2,000 receiving yards this year, a milestone he fell just short of when he set the NFL single-season record of 1,964 yards last year.

He wants more touchdowns, too. Johnson’s five scores last year were his lowest total since 2009.

And though it’s not his nature to be out front as a leader, Johnson said he knows he needs to be more vocal as the elder in the Lions’ receiving room, now that Jefferson is in Tennessee.