The Indianapolis Colts signed free agent defensive tackle LaJuan Ramsey to take the spot of Ed Johnson, who was waived today after his Wednesday arrest on a charge of marijuana possession. Ramsey, 24, was a sixth-round draft pick of the Philadelphia Eagles in 2006 who played in 15 games for the Eagles. Philadelphia waived him this past June, and he was claimed by San Francisco. The 49ers cut him before the start of the regular season. The 6-3, 300-pound Ramsey helped USC post a 48-4 record and win two national championships. Coach Tony Dungy said this afternoon that Eric Foster, an undrafted rookie, will start alongside defensive tackle Keyunta Dawson when the Colts meet the Minnesota Vikings on Sunday in Minneapolis. http://www.indystar.com/apps/pbcs.dll/article?AID=/20080911/SPORTS03/809110522/1100