The Steelers have begun signing their 2010 draft picks on Thursday as fourth-round linebacker Thaddeus Gibson was signed to a three-year contract. Financial terms were not disclosed. Gibson started 23 games at defensive end for Ohio State University, replacing Vernon Gholston for the 2008 season. In 35 career games, Gibson totaled 82 tackles, including 25 for a loss and 10 quarterback sacks, and earned second-team All-Big Ten honors after the 2009 season. Gibson declared for the 2010 NFL Draft after his junior year, citing his mother’s health issues as playing a role in his decision.