Game 4 may have been a pivotal one in the American League Championship Series, and Mississippi State product Kendall Graveman played a pivotal role. Graveman threw two scoreless innings — the seventh and eighth — and got the win as Houston rallied past Boston 9-2 Tuesday night at Fenway Park to square the series at 2-2. Graveman was one of five Astros relievers who worked 7 2/3 shutout innings after starter Zack Greinke was pulled in the second inning. The two-inning stint was the longest for Graveman since he joined the Astros in a late July trade with Seattle. “I was mentally preparing myself to go three, honestly,” he told mlb.com. The Astros went to closer Ryan Pressly in the ninth after scoring seven runs in the top of the inning. Appearing in the postseason for the first time in his seven years in MLB, Graveman has been good: three scoreless innings in the ALCS and a 1.50 ERA in five appearances overall. The right-hander was a closer with Seattle (0.82 ERA, 4-0, 10 saves) but saw his role change to set-up man in Houston. He scuffled at times, posting a 3.13 ERA with three blown saves and seven holds in 23 games. He looked to be in top form on Tuesday. Strangely enough, the only batter to reach against Graveman was Hunter Renfroe, his former teammate at MSU, who drew a two-out walk in the eighth. It was just the second time they had faced each other in the big leagues; Graveman struck out Renfroe in that previous encounter. Renfroe, who had a monster season for the Red Sox, has had a quiet series (1-for-11 with four walks).