ENGLEWOOD, Colo. -- History is getting a second look.

Peyton Manning's stat line from the Denver Broncos' 34-14 win Sunday over the Oakland Raiders was 25-of-28 passing for 266 yards and four touchdowns. The four TD passes gave him 55 for the season, extending his record total to five more than Tom Brady's former mark. The yardage total gave Manning 5,477 -- one more than Drew Brees' 2011 record.

The league's record-keepers were taking another look at things Monday, as is customary each week in the season. At issue, according to sources, is a 7-yard completion from Manning to Eric Decker with just over a minute remaining in the first quarter.

Manning set the mark on the last play from scrimmage for the Broncos before halftime, a 5-yard touchdown pass to Demaryius Thomas. He did not play in the second half.

In one camera angle, the pass to Decker looks like a lateral, which would make it a running play. Another angle, from above, shows Decker receiving the ball at the Broncos' 48-yard line, with Manning slightly deeper than that.

If the play stands, Manning would keep the record. If it is eventually ruled a run, he would be credited with 259 yards Sunday and 5,470 this season. The 5,470 would be the second-highest season total in league history and still easily be Manning's career best.

In recent weeks, Manning has said the touchdown record was more significant because it represented the result of an offense scoring points as it tried to win games. Even Sunday, after he'd set the yardage record, he replied to a question about that mark with: "I don't really have much to say about it, to tell you the truth."

Plays are routinely reviewed throughout the season by Elias Sports Bureau, which keeps the league's statistical records, and teams are often notified in the days following games of corrections in items such as sacks or rushing and passing yardage.