The report that multiple teams have contacted the Lions about trading for the rights of retired receiver Calvin Johnson seems like it’s not going to lead to Johnson returning, primarily because there’s no indication that he wants to return. If he does, and if he doesn’t want the Lions to pick his next destination, via trade, Johnson needs to do one thing: Show up. If he’d unretire and report to the Lions, Johnson’s $16 million base salary (prorated) would instantly land on the books and, more importantly, hit the salary cap. This would force the Lions to move quickly, unless they’re prepared to pay him more than $940,000 per week. If they’d cut him, Johnson be free to sign with any other team. If they cut him after the trade deadline, he’d first have to clear waivers.