Knebel was signed at slot, which Major League Baseball pegged at just over $1.4 million.
Tigers vice president of amateur scouting David Chadd said earlier this month that the team envisions Knebel as a starter. For the time being, though, he'll begin his pro career in the bullpen. Knebel is eventually expected to join Crawford and other Tigers Draft picks at short-season Class A Connecticut, but will begin working out in Lakeland, Fla.
Jason Beck is a reporter for MLB.com. Read Beck's Blog and follow him on Twitter @beckjason. Bobby Nightengale is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.