[3] During the 2010 season, the Red Sox traded McGuiness with Román Méndez to the Texas Rangers for Jarrod Saltalamacchia.

[6] McGuinness was the everyday first baseman for the Frisco RoughRiders of the Double–A Texas League for the 2012 season, hitting .268 with 23 home runs and 77 RBIs in 123 games.

After the completion of the Triple–A season, the Pirates designated McGuiness for assignment so that they could promote John Holdzkom to the major leagues.

[11] On December 22, 2014, he signed a minor league contract with the Philadelphia Phillies, receiving an invitation to spring training.

McGuiness has an older brother, Brian, who also played baseball at James Island and at the College of Charleston.