Trade Calvin Johnson? That’s been a hot topic on sports radio and Internet message boards this week, as disgruntled Lions fans try to find new ways to fix an old problem: turning this franchise around. But the mere mention of dealing Johnson, the Lions’ No. 2 overall pick in 2007 and one of the league’s top receivers, draws a mixture of derision and dismay from his coaches and teammates, says the Detroit News. And to be clear, there’s no inclination by the Lions to explore the trade possibilities. Johnson, who is signed through 2012, actually earns less in salary ($2.58 million) this season than right guard Stephen Peterman or backup cornerback Anthony Henry. Even in the final year of his contract, he’ll only make $4.7 million — about half what the Dallas Cowboys are paying for Roy Williams, whom the Lions traded last fall in the final year of his contract.