NFC Championship: Brandon Aiyuk (11) of the San Francisco 49ers catches a pass that was tipped by Detroit's Kindle Vildor during the third quarter. The reception was good for 51 yards and was a turning point in the game for San Francisco. (Ezra Shaw/Getty Images)
NFC Championship: Detroit's Penei Sewell was fired up before Sunday's game. (Kevin Sabitus/Getty Images)
NFC Championship: San Francisco quarterback Brock Purdy warms up before Sunday's game. (Ezra Shaw/Getty Images)
NFC Championship: Detroit's Jameson Williams (9) fights off tacklers en route to a 42-yard touchdown run in the first quarter. (Ezra Shaw/Getty Images)
NFC Championship: Lions running back David Montgomery gains yardage during the first quarter. (Ezra Shaw/Getty Images)
NFC Championship: San Francisco's Fred Warner (54) breaks up a pass intended for Detroit's Amon-Ra St. Brown. (Ezra Shaw/Getty Images)
NFC Championship: San Francisco's Deebo Samuel reacts after a first down during the first quarter. (Thearon W. Henderson/Getty Images)
NFC Championship: Detroit's Aidan Hutchinson (97) makes a point during first-half action. (Thearon W. Henderson/Getty Images)
NFC Championship: Christian McCaffrey celebrates after scoring a touchdown during the second quarter against the Detroit Lions. (Thearon W. Henderson/Getty Images)
NFC Championship: Jahmyr Gibbs (26) sprints into the end zone to give Detroit a 21-7 lead in the second quarter. (Thearon W. Henderson/Getty Images)
NFC Championship: Detroit quarterback Jared Goff (16) calls a play during the second quarter. (Ezra Shaw/Getty Images)
NFC Championship: Lions head coach Dan Campbell reacts to a play during the second quarter. (Ezra Shaw/Getty Images)
NFC Championship: Chase Young (92) of the San Francisco 49ers tackles Detroit's Jahmyr Gibbs during the second quarter. (Ezra Shaw/Getty Images)
NFC Championship: Javon Hargrave #98 of the San Francisco 49ers tackles the Lions' Jahmyr Gibbs. (Kevin Sabitus/Getty Images)
NFC Championship: The 49ers' Deebo Samuel looks for running room while Detroit's Josh Paschal gives chase during the third quarter. (Ezra Shaw/Getty Images)
NFC Championship: Kindle Vildor (29) of the Detroit Lions attempts to intercept a pass intended for Brandon Aiyuk (11) of the 49ers during the third quarter. (Ezra Shaw/Getty Images)
NFC Championship: Hall of Fame quarterback Joe Montana of the San Francisco 49ers liked what he saw of his former team, which erased a 17-point deficit in the third quarter to tie the game. (Kevin Sabitus/Getty Images)
NFC Championship: San Francisco's Nick Bosa (97) sacks Detroit quarterback Jared Goff during the third quarter. (Kevin Sabitus/Getty Images)
NFC Championship: Quarterback Brock Purdy (13) scampers for yardage during the third quarter. (Thearon W. Henderson/Getty Images)
NFC Championship: A view of Levi's Stadium during the third quarter. (Ezra Shaw/Getty Images)
NFC Championship: Detroit's Anthony Firkser (86) is stopped short of the goal line during the fourth quarter. (Thearon W. Henderson/Getty Images)
Brock Purdy: The 49ers quarterback (13) and his teammates ran over the Detroit Lions in the second half. (Thearon W. Henderson/Getty Images)
NFC Championship: Brock Purdy (13) of the San Francisco 49ers hands the ball to Elijah Mitchell (25) for the game-clinching touchdown during the fourth quarter against the Detroit Lions. (Thearon W. Henderson/Getty Images)
NFC Championship - Detroit Lions v San Francisco 49ers San Francisco's Fred Warner reacts after a defensive stop during the fourth quarter. (Thearon W. Henderson/Getty Images)
NFC Championship: Quarterbacks Brock Purdy, left, and Jared Goff meet on the field after the 49ers' victory. (Ezra Shaw/Getty Images)
