The Seattle Mariners have signed Kevin Millwood, according to his sister -- not one of our regular sources. However, Jon Heyman of CBS Sports was able to confirm and says it's a minor league deal with a good chance for Millwood to make the team:

• Twitter / @JonHeymanCBS - "Millwood has deal with #mariners"
• Twitter / @JonHeymanCBS - "millwood deal is minor-league deal but has good chance to make team. wedge & p. coach carl willis were w/ "wood'' in cleve"
• Here Comes Kevin Millwood - Lookout Landing
  "The minor league contract part is interesting, since Millwood reportedly turned down a guaranteed contract from the Rockies earlier in the offseason, but Millwood's probably going to make the team, and he's probably going to make $1 million or $2 million or something as a part of the team. The minor league contract protects the Mariners if Millwood is terrible in Arizona, but you have to figure he's got a great chance."

• Mariners reportedly ink veteran righty Kevin Millwood - Tom Singer | mlb.com
  "Millwood, who turned 37 on Christmas Eve, last season went 4-3 in nine starts with the Rockies, who returned him to the Majors in mid-August after he had spent most of the year in the Minors in the Yankees and Red Sox organizations."
• Kevin Millwood Signs On With Seattle Mariners - Baseball Nation
  "Millwood's not a rotation lock, but he's a rotation probable. It doesn't hurt that Mariners manager Eric Wedge and pitching coach Carl Willis had him with the Indians in 2005. Veteran leadership and all that. Millwood could be expected to serve as a stabilizing force and mentor until or through midseason. He's a stopgap, but he's a stopgap who could conceivably be of use in the development of guys like Noesi, Beavan, Furbush and Danny Hultzen."