Rex Grossman showed his good and bad sides.

He fumbled another snap and had an interception returned 52 yards for a touchdown. But along with the mistakes came the moments of brilliance that have teased the Chicago Bears the past few seasons.

Grossman played the first half and passed for 211 yards and two touchdowns, and the defending NFC champions held off the San Francisco 49ers 31-28 in a preseason game on Saturday night