"Knees good as well as the rest of me. Been working hard and glad to be able to get out there with this exciting club," Hart said in a text message.
Seattle has made adding offense a top priority this offseason, starting with a yet-to-be-finalized agreement with Cano said to be worth $240 million over 10 years.
After giving outfielder Curtis Granderson a $60 million, four-year contract, the Mets reached agreement on a $20 million, two-year deal with the 40-year-old Colon, raising their free-agent spending to more than $87 million this offseason. The contract is pending the completion of a physical for Colon, who was an unlikely star last season at Oakland, collecting 18 wins.
Pittsburgh agreed to a $5 million, one-year contract with pitcher Edinson Volquez, also pending a physical. The 30-year-old Volquez went 9-12 with a 5.71 ERA this year while splitting time between San Diego and the Los Angeles Dodgers.
Earlier on Wednesday, the Pirates and pitcher Charlie Morton agreed to a $21 million, three-year contract extension that avoided salary arbitration.
Also at the meetings, Matt Kemp's agent maintained the Los Angeles Dodgers are not trading the All-Star outfielder for now.
"For the time being they are not going to move him," Dave Stewart said after meeting with Los Angeles GM Ned Colletti.
Mike Scioscia, manager of the rival Angels, said he's counting on a healthy Albert Pujols, limited to 99 games and 64 RBIs by a foot injury that ended his season in mid-August.
"He's taking batting practice. He feels very strong physically," Scioscia said. "The foot will be a non-issue."
Detroit finalized a $10 million, two-year contract with outfielder Rajai Davis, Houston acquired pitcher Anthony Bass from San Diego in a deal that also sends a player to be named or cash both ways, and Oakland sent pitcher Jerry Blevins to Washington for minor league outfielder Billy Burns the Athletics' fifth trade in 10 days.
Utilityman Jerry Hairston Jr. said he is retiring.
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AP Sports Writers Tim Booth, Will Graves and Howie Rumberg contributed to this report.