2017 San Francisco 49ers season
The 2017 San Francisco 49ers season was the franchise's 68th season in the National Football League and their 72nd overall. It was also the first season under the head coach/general manager tandem of Kyle Shanahan and John Lynch. After a 0–9 start, they won 6 of their last 7 games and finished the season 6–10, improving from their last two season records. Despite this, the 49ers were eliminated from playoff contention in Week 12.
2017 San Francisco 49ers season
The 49ers season largely turned around after they acquired quarterback Jimmy Garoppolo from the New England Patriots on October 30, 2017. At this point, the 49ers had a record of 0–8, dead last in the NFC. Garoppolo made his first start during week 13 against the Chicago Bears and would lead them to a 15–14 win. Garoppolo would win the final five games of the season for the 49ers, bringing the regular-season record to 6–10, the most wins by the team since the 2014 season. During the 5-game win streak, the 49ers would win 3 straight games over teams that eventually made the playoffs (Weeks 15–17 against the Titans, Jaguars, and Rams). From weeks 1–12, the 49ers scored just 187 points (17 points per game), which was in the bottom half of the league. During the 5-game win streak, the 49ers offense scored 144 points (28.8 points per game). The highlight of the year was during week 16, the 49ers scored 44 points against the Jacksonville Jaguars, who had the NFL's top scoring defense at the time, allowing just 14.9 points per game. The 49ers finished the season by being the only team in the NFL to go undefeated in the month of December. The 49ers also became the first team in NFL history to start a season 0–9 and finish with more than three wins.
Kyle Shanahan
Kyle Michael Shanahan (born December 14, 1979) is an American football coach who is the head coach of the San Francisco 49ers of the National Football League (NFL). He previously served as the offensive coordinator for the Atlanta Falcons, Cleveland Browns, Washington Redskins and Houston Texans. With the Falcons in 2016, he coordinated an offense that led the league in points scored and helped the team reach Super Bowl LI. Shanahan was hired as the head coach by the 49ers in 2017, replacing Chip Kelly. In his third season with the team, Shanahan led the 49ers to a loss in Super Bowl LIV.
Kyle Shanahan
Shanahan was born in Minneapolis, Minnesota, while his father coached at the University of Minnesota. He attended Saratoga High School in Saratoga, California in 1994, while his father worked as offensive coordinator for the San Francisco 49ers. He later attended Cherry Creek High School in Greenwood Village, Colorado, while his father served as head coach of the Denver Broncos. Shanahan accepted a scholarship offer by Carl Franks of Duke University, but chose to transfer as redshirt freshman to the University of Texas at Austin. Shanahan played wide receiver on a Longhorn team that featured future college coach Major Applewhite as well as future NFL players Roy Williams, Cedric Benson, Bo Scaife, Mike Williams, Quentin Jammer, and Chris Simms. Shanahan caught 14 passes for 127 yards in his career for the University of Texas at Austin.

Question: This American football coach who is partnered with John Lynch and whose father was head coach of Los Angeles Raiders is a part of which Football League?
Answer: National Football League