Feb 17, 2013, 9:07 AM EST
The deal comes with an invitation to spring training, where Cust will attempt to earn a backup role.
Cust spent the entire 2012 season at the Triple-A level, batting .243/.400/.442 with 20 home runs, 15 doubles and 72 RBI in 493 plate appearances between affiliates of the Yankees and Blue Jays.
The 10-year major league veteran registered a .213/.344/.329 batting line with three home runs, 15 doubles and 23 RBI over 270 plate appearances with Seattle in 2011. He is a .242/.374/.439 career hitter in the bigs.