Prior to the start of the 2008 season, the Tigers signed Granderson to a five-year, US$30.25 million contract with a club option for 2013. Granderson continued hitting well during the 2008 regular season, finishing with a .280 batting average, 13 triples and 22 home runs. He continued to improve his plate discipline, striking out only 111 times (versus 141 in 2007 and 174 in 2006) and drawing a career-high 71 walks. During August, he hit six triples, including two in consecutive innings during a game against the Texas Rangers.