Source: Colts interview Ryan Grigson

Eagles director of player personnel Ryan Grigson was in Indianapolis on Tuesday, interviewing for the Colts' vacant general manager position for a second time, a league source told ESPN NFL Insider Adam Schefter.

Two NFL sources familiar with the process told Schefter they believed Grigson had emerged as a favorite, if not the favorite.

Colts owner Jim Irsay previously listed Grigson as one of seven candidates for the position that opened when Irsay fired Indy vice chairman Bill Polian and his son, Chris, the Colts' GM.

Information from The Associated Press contributed to this report.