(Photo by Len Redkoles/Getty Images)

Ruben Amaro Jr, and the Phillies continue to add some bodies to their farm system, by signing three players to minor league contracts earlier this week.

Those players include first baseman Chris McGuiness, and righthanded pitchers Kevin Slowey and Sean O'Sullivan.

Chris McGuiness, 26, appeared in 10 games in 2013 with the Texas Rangers. Last season he hit .264 with a .770 OPS and nine home runs in 126 games for the Pirates Triple-A Affiliate.

Slowey, 30, is 43-36 with a 4.62 ERA in seven big-league seasons split between Minnesota and Miami. His best year, came in 2008, when he went 12-11, posting a 3.99 ERA with two shutouts in 27 starts with the Twins. Last season with the Marlins, Slowey went 1-1 with a 5.30 ERA in 17 games before he was designated for assignment in June.

O'Sullivan, 27, was with the Phillies organization in 2014, as he went 6-10 with a 4.30 ERA in 25 starts at Triple A Lehigh Valley. He also had a brief stint with the Phillies going 0-1 with a 6.39 ERA in three games.

All three players have received invitations to spring training, although they are considered non-roster invitees.