"I owe it to this team and to these fans to never do anything like that again when we have that opportunity to win the game," Grossman said.
Grossman is a team captain in just his second-year in the league and is proving his leadership skills.
"Rex is one of captains. Captains do that. When times are bad, they are going to step up and want to take a lot of the blame," Lovie Smith said.
After going 48 attempts without an interception in the preseason, Grossman was picked off twice by the Lions secondary. In his fourth career start he completed 16-of-35 attempts for 227 yards.
Still, don't expect Grossman to become gun shy in the future.
"When it's there I'm going to take it," Grossman said. "If there's a play I'm still going to be aggressive, but I'm going to make sure I throw a safe ball as well."
During Ruben Brown's nine years in Buffalo he blocked for several solid quarterbacks and said Grossman could be the best of the bunch.
"He's got the toughness of Jim Kelly and the mobility of Doug Flutie. If you combine those two together the sky is the limit," Brown said.
Streak Snapped: When Bracy Walker returned Paul Edinger's blocked field goal for a touchdown it was the first time in 85-year history that an opponent had ever achieved the feat.
Overcoming the Odds: The Lions lost Charles Rogers in the first quarter of the game with a shoulder injury, which left Roy Williams as Joey Harrington's top option. The rookie caught four balls for 69 yards, including the game-winning touchdown.
Detroit also lost the Pro Bowl cornerback Dre' Bly midway through the first quarter with a knee injury. Andre Goodman replaced Bly and picked off Rex Grossman on the opening play of the second quarter. The quarterback under threw an open Daryl Jones and Goodman made a leaping grab.
Picking up the Sack: As a rookie Michael Haynes had just two QB takedowns, but he notched the only sack of the day for the Bears defense.
The Lions allowed just 10 sacks of last year, which was the lowest number in the NFL. The Bears had the fewest sacks in the league with 18.
Breakout Performance: David Terrell easily had his best game in a Bears uniform. He had receptions of 35, 31, 27 and 19 yards in route to recording his first 100-yard receiving day of his career. He had a game-high 126 yards on five receptions.
"David played well," Grossman said. "He's been working hard all off-season and preseason. This first game he really stepped it up and made some big plays.
The former first-round pick averaged 8.4 yards per reception last year and his best output was 48 yards receiving on two occasions.
The effort pushed Terrell to 1,029 career receiving yards on 91 receptions.
Last Time: Tommie Harris became the first rookie to start at defensive tackle on opening day since Roger Stillwell in 1975.
Dual Threat: Thomas Jones led the Bears in rushing and receiving. He carried the ball 21 times for 67 yards and two touchdowns, while catching six balls for 38 yards. He combined for 105 yards of offense.
Inactives: Although Anthony Thomas missed the entire preseason with an abdominal strain, the Bears decided to sit Adrian Peterson against Detroit. Peterson led the team in rushing in the preseason, but suddenly could find carries to be sparse. In a reserve role Thomas carried the ball just three times for 13 yards.