Answer:
Patrick Mahomes has played in the NFL for 3 years. He was drafted by the Kansas City Chiefs in 2017 and played his first game in the 2018 season.
Step-by-step explanation:
Patrick Mahomes is a professional American football player who plays as a quarterback for the Kansas City Chiefs in the National Football League (NFL). He was drafted by the Chiefs in the first round of the 2017 NFL Draft. His first season in the NFL was in 2018, and he played in all 16 games that season. He was the starting quarterback for the Chiefs and led them to the playoffs. In his second season in the NFL, 2019, he led the Chiefs to helped lead the Chiefs back to the Super Bowl, although they lost to the Tampa Bay Buccaneers. Therefore, Patrick Mahomes has played in the NFL for 3 seasons, starting from the 2018 season.