Question: Which NFL coach served as a linebackers coach for the San Francisco 49ers before being named interim head coach in their 60th season in the NFL?

<P0-S0> The 2012 New Orleans Saints season was the franchise's 46th season in the National Football League, and the 37th with home games at the Superdome. <P0-S1>  It "was" going to be the seventh season under head coach Sean Payton; however, he was suspended by the NFL for the entire 2012 season as part of the punishment for the team's bounty scandal. <P0-S2>  On April 12, 2012, linebackers coach Joe Vitt was named interim head coach to replace Sean Payton while he served his one-year suspension. <P0-S3>  On August 22, 2012, it was announced that Aaron Kromer would take over while Vitt himself served a six-game suspension to start the regular season. <P0-S4>  The Saints attempted to make history as the first host team to play the Super Bowl on their own home field, but they were eliminated from post-season contention in Week 16. <P0-S5>  The Saints set an NFL record for most yards given up by a defense, 7,042 yards, surpassing the 1981 Baltimore Colts record of 6,793 yards. <SEP> <P1-S0> Ruffin Horne McNeill Jr. (born October 8, 1958) is an American football coach and former player. <P1-S1>  He is currently the assistant head coach and defensive tackles coach at the University of Oklahoma. <P1-S2>  He was previously the assistant head coach and defensive line coach at the University of Virginia. <P1-S3>  McNeill also served as the head coach of the East Carolina Pirates from 2010 to 2015. <P1-S4>  Before being named head coach of the Pirates, McNeill served the Texas Tech Red Raiders as an interim head coach, assistant head coach, special teams coordinator, and linebackers coach. <P1-S5>  On December 28, 2009, he was named interim head coach of the Red Raiders following the suspension and later firing of head coach Mike Leach. <P1-S6>  He served in the position until the hiring of Tommy Tuberville, who subsequently released him as defensive coordinator. <SEP> <P2-S0> The 2009 San Francisco 49ers season was the franchise's 64th season, 60th in the National Football League, and the first full year with Mike Singletary as head coach after being named interim head coach in 2008. <P2-S1>  It is the seventh year in which the 49ers have their seventh offensive coordinator. <P2-S2>  They were looking to improve upon their 7–9 record from 2008 with the 10th overall pick in the 2009 NFL Draft, <SEP> <P3-S0> Michael Singletary (born October 9, 1958) is an American football coach and former professional football player. <P3-S1>  After playing college football for Baylor University, Singletary was drafted by the Chicago Bears in the 2nd round of the 1981 NFL Draft and was known as "The Heart of the Defense" for the Chicago Bears' Monsters of the Midway in the mid-1980s. <P3-S2>  He was inducted into the Pro Football Hall of Fame in 1998. <P3-S3>  Singletary later pursued a career as a coach, first as a linebackers coach for the Baltimore Ravens, then as the linebackers coach for the San Francisco 49ers. <P3-S4>  In 2008, the 49ers promoted Singletary to the head coaching position after previous head coach Mike Nolan was fired during the season, and he remained in that position until he was fired after the 49ers were eliminated from the playoffs with one game remaining in the 2010 season.