Who did alex smith replace as quarterback?

Alex Smith replaced Donovan McNabb as the starting quarterback for the Washington Football Team (formerly known as the Washington Redskins) in 2018. Prior to that, he was the starting quarterback for the San Francisco 49ers, where he had replaced a number of quarterbacks during his tenure, including Shaun Hill and later Colin Kaepernick. Smith's career has seen him step in for various quarterbacks due to trades, injuries, and performance changes throughout his time in the NFL.