• A's Hot Stove Tracker
The right-hander appeared in 19 games for the A's last season and posted a 4.39 ERA across 26 2/3 innings.
Although Leon had six stints with the Major League club in 2015, he spent the bulk of the season with Triple-A Nashville, where he went 2-5 with a 2.95 ERA and one save in 58 innings.
William Boor is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.