Smith completed 18 of 19 passes in Monday night's 24-3 shellacking of the Arizona Cardinals, one pass shy of the minimum 20 attempts needed to qualify for the record. Tuesday, the 49ers asked the NFL to review a fourth-quarter toss to Michael Crabtree that was ruled a lateral.
We said Tuesday that the pass looked like a lateral, and the league apparently agreed.
Smith's near-pristine performance came on the heels of two shaky games, which woke some of the old questions about the 49ers quarterback's ability to lead his team to a championship. Head coach Jim Harbaugh described those rumblings as "just gobble, gobble, gobble turkey from jive-turkey gobblers" in his postgame news conference.
Current NFL Network analyst Kurt Warner remains the single-game completion percentage record-holder. He earned the record during his stint with the Cardinals when he completed 24 of 26 passes (92.3 percent) against the Jacksonville Jaguars on Sept. 20, 2009.
Follow Kevin Patra on Twitter @kpatra