The only thing manager Dale Sveum hoped to change Wednesday in the Chicago Cubs' home finale was a win over Pittsburgh. “I’m not going to do anything different than we have in the two years or past managing" said Sveum whose future remains in question. "I'm just going to do what I do. The evaluation is up to them (team officials) and I don’t think four games is going to change anything.’’ The Cubs who already assured themselves for most home losses (50) and a last-place finish in the National League Central snapped a 1-1 tie in the bottom of the sixth inning when Darnell McDonald hit a three-run home run off left-handed ace Francisco Liriano for a 4-2 victory. That provided long-awaited support for Jake Arrieta who limited the Pirates to one run on four hits in six innings. Arrieta (4-2) whose ERA dropped to 3.66 moved closer to securing a spot in the rotation for 2014. The Cubs drew a paid crowd of 26171 putting their home paid attendance total at 2642682 their lowest since 1998. The Pirates scored their only run off Arrieta in the third on two singles and two walks. Those were the only two walks issued by Arrieta. The Cubs took a 1-0 lead in the first on a double by Darwin Barney and a single by Anthony Rizzo. McDonald led off the second with a double but was left stranded.