Houston Texans veteran wide receiver Andre Johnson is exercising his right to skip voluntary organized team activities.
Johnson has also said he won't attend a mandatory minicamp in June.
"I have a ton of respect for him," Texans coach Bill O'Brien told reporters. "We'd love to have him here now. That's up to him."
Johnson has complained about the direction of the Texans, but hasn't specified what he's unhappy about other than a lack of winning and coaching changes. He has been a part of three winning seasons since being drafted in the first round by the Texans in 2003.
Johnson hasn't requested a trade.
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Aaron Wilson covers the Ravens for The Baltimore Sun