I don't think Simmons or Ingram is some kind of franchise savior. Simmons is a great fit as a 4 in the modern NBA though because he can guard inside and on the perimeter, rebound, handle the ball like a guard, and score inside. Even if he never develops a reliable jumper, he is still going to be a very valuable player. I see him as a better version of Draymond Green who can create offense on his own much better than Green.
Aggressive runner off the catch; can break some tackles
Great hands and ball skills
Shows ability to adjust to poorly thrown ball
Elite concentration when ball is in air; good body control
Tough and will hang onto ball after big hit
Knows how to take advantage of his size; plays as big as he is
Will go over the middle
Very good blocker
Does a good job of selling routes
Dips his hips and changes speeds in routes
Great character and work ethic
Doesn't show much upside after the catch
Lacks some agility
Doesn't have a second gear or explosive speed
Not much of a deep threat
Might struggle with bump coverage in NFL
Summary: Decker is the prototypical possession, No. 2 receiver in the NFL. Teams will know exactly what they will get with Decker because he will work hard on and off the field. He will never be a stat monster in the NFL, but he will draw away double teams and he is a major threat in the red zone to score with his size, body control and hands. Decker will probably go off the board in the late first to early second round.
Player Comparison: Kevin Walter. Walter is a very reliable possession receiver for the Texans, but doesn't have much upside.