"We are excited to make this announcement," Spagnuolo said in a statement released by the team. "All three are exactly what we are looking for. All are of high character and all about team. We feel very fortunate to add to our staff great teachers with tremendous experience. They look forward to getting started."
Curl, who was the Kansas City Chiefs' assistant head coach and quarterbacks coach for the past three seasons, will hold the same titles in St. Louis. The 46-year coaching veteran came to the NFL in 2000 and worked in the Chiefs' scouting department and also was on the New York Jets' staff from 2003 to 2005 as an assistant.
Leonard, who spent the last two seasons at Kansas State as tight ends coach, will be on St. Louis' offensive staff. He's a 28-year coaching veteran and most recently spent time in the NFL as a special assignment scout for the New England Patriots from 2003 to 2006.