The Cleveland Browns selected wide receiver Antonio Callaway with the 105th overall draft pick.
Callaway tested postivive for marijuana at the combine.
Callaway's new agent, Malki Kawa, said Tuesday that it was for a diluted sample. A diluted sample is treated as a positive test result under the NFL's Policy and Program on Substances of Abuse.
"The main thing is, I take responsibility for everything I caused on myself, the things that could've been avoided," Callaway told NFL Network. "And the birth of my daughter, she changed my point of view on life.