season due to an injury to Staubach, Staubach took back the starting job when he rallied the Cowboys in a come-from-behind win in the playoffs and Morton was subsequently traded; Staubach and Morton faced each other in Super Bowl XII. Another notable quarterback controversy involved the San Francisco 49ers, who had three capable starters: Joe Montana, Steve Young and Steve Bono. Montana suffered a season-ending injury that cost him the 1991 NFL season and was supplanted by Young. Young was injured midway through the season, but Bono held the starting job (despite Young's recovery) until Bono's own injury let Young reclaim it. Montana also missed most of the 1992 NFL season, making only one appearance, then was traded away at his request to take over as the starter for the Kansas City Chiefs; upon retirement, he was succeeded by Bono as the Chiefs' starting quarterback. Teams will often bring in a capable backup quarterback via the draft or a trade, as competition or potential replacement which would certainly threaten the starting quarterback's place in the team (see Two-quarterback system below). For instance, Drew Brees began his career with the San Diego Chargers but the team also drafted Philip Rivers; despite Brees initially retaining his starting job and being the Comeback Player of the Year he was not re-signed due to an injury and joined the New Orleans Saints as a free agent. Brees and Rivers both retired in 2021, each having been a starter for the Saints and Chargers, respectively, for over a decade. Aaron Rodgers was drafted by the Green Bay Packers as the eventual successor to Brett Favre, though Rodgers served in a backup role for a few years to develop sufficiently for the team to give him the starting job; Rodgers would himself encounter a similar situation in 2020 when the Packers drafted quarterback Jordan Love. Similarly, Patrick Mahomes was selected by the Kansas City Chiefs to eventually supplant Alex Smith, with the latter willingly serving as a mentor. Trends and other roles In addition to their main role, quarterbacks are occasionally used in other roles. Most teams utilize a backup quarterback as their holder on placekicks. A benefit of using quarterbacks as holders is that it would be easier to pull off a fake field goal attempt, but many coaches prefer to use punters as holders because a punter will have far more time in practice