With the Winter Meetings behind us and many big free agents and trade targets still available, we're still being treated to an almost daily supply of rumors regarding all of that. Speaking of which, Sunday's round of rumors can be found just below.

The Mariners have an opportunity to use some of their excellent starting pitching depth to improve the offense but the team has doubts.

Nolan Arenado and the Cardinals are looking to move on, and per a report the Phillies are one of six places he'd play.

The Seattle Mariners are getting calls on veteran right-handed starter Luis Castillo, and they're at least listening to those calls. Ken Rosenthal of The Athletic puts the Castillo trade talk into some context.

The Seattle Mariners are at the center of offseason trade discussions as interest grows around their ace, Luis Castillo. According to Ken Rosenthal of The Athletic, the Mets, Cubs, Red Sox, and Orioles have inquired about the availability of the 32-year-old right-hander,

A report from The Athletic’s Ken Rosenthal this evening name-checks two more clubs who have “at least inquired” after the veteran: the Mets and the Orioles.