The Broncos opened the regular season on the road against the St. Louis Rams on September 10 in the Edward Jones Dome. The game was primarily a defensive battle, with only one touchdown scored in the entire game, and the Rams won 18-10. Jake Plummer struggled throughout the game, throwing 3 interceptions, losing a fumble, and being sacked 4 times, 2 of them by Leonard Little. Tatum Bell also lost a fumble, but ran for 103 yards. Rookie Mike Bell ran for 58 yards and scored the only touchdown in the entire game late in the second quarter on a 1-yard run. Kicker Jeff Wilkins provided all of the scoring for the Rams, making 6 field goals, tying a franchise record, while running back Steven Jackson was one of the few bright spots for the Rams offense, running for 121 yards. The five turnovers by the Broncos was the most for them since the 2000 season.  The Broncos would start their season at 0-1.
Question: How many turnovers did Jake Plummer commit?
Answer: 4