McGuiness, a former 13th round pick by the Boston Red Sox, is left handed power oriented first baseman who primarily played in AAA last season. He hit only .246 with 11 HR but has a very strong K to BB ratio (4 BB per 5 K). He is expected to be the Pirates left handed option in a 1B platoon.
Miles Mikolas is a right handed relief pitcher who possesses a 98 mph fastball and an average curveball. The main knock against him is that although his fastball is hard, it is also generally flat and does not have much movement. Mikolas debuted in 2012 and posted a respectable 3.62 ERA in the pen but his K/9 ratio was very underwhelming (6.4) and his BB rate was high (4.2 per 9 innings.) Mikolas spent most of 2013 in AAA Tucson as the closer and converted 26 saves.
(This takes 1 of the last remaining suitors for Ike Davis out of the equation. While McGuiness is not comparable to Davis' upside, the fact that the Texas Rangers only received a guy whose ceiling is a middle reliever and could end up being a AAAA player is going to kill the possible return Sandy can get. This could possibly be the nail in the coffin that keeps Ike in New York for 2014.)