Ryan Cook (back) will begin a rehab assignment with the Mariners' Arizona Rookie League affiliate on Sunday.
Ryan Cook (back) has been throwing well at extended spring training, per manager Scott Servais.
Mariners placed RHP Ryan Cook on the 60-day disabled list with a right lat strain.
Ryan Cook is suffering from a lat strain.
Ryan Cook is being slowed by a sore back.
Mariners signed RHP Ryan Cook to a one-year contract.
Cubs non-tendered RHP Ryan Cook.
Cubs claimed RHP Ryan Cook off waivers from the Red Sox.
Red Sox recalled RHP Ryan Cook from Triple-A Pawtucket.
Red Sox optioned RHP Ryan Cook to Triple-A Pawtucket.
Red Sox acquired RHP Ryan Cook from the Athletics for a player to be named later or cash considerations.
Alex Speier of the Boston Globe reports that the Red Sox have acquired Ryan Cook from the Athletics.
Athletics optioned RHP Ryan Cook to Triple-A Nashville.