49ers coaching candidates tracker 1.0

SANTA CLARA, Calif. -- The San Francisco 49ers coaching search is in its fourth day and the team has already interviewed two candidates with two more scheduled through the weekend. A quick glance at the candidates:

Sean Payton: The seeming frontrunner said he was staying put in New Orleans.

Hue Jackson: The former Oakland Raiders coach and current Cincinnati Bengals offensive coordinator is not free to interview until Sunday, after the Bengals play the Pittsburgh Steelers in the playoffs. His offense was the No. 15-ranked unit in the NFL.

Mike Shanahan: The Niners offensive coordinator the last time they won a Super Bowl, Shanahan also won a pair of Super Bowl rings with the Denver Broncos in the late 1990s. He has reportedly had phone conversations with the Niners but no official interview yet.

Chip Kelly: The former Philadelphia Eagles coach reportedly met with the 49ers on Thursday and he could be the most intriguing candidate given the way he might be able to use quarterback Colin Kaepernick.

Anthony Lynn: The Buffalo Bills running backs/assistant head coach interviewed with the Niners this week. The Bills had the No. 1 rushing offense in the NFL this season, averaging 152.0 yards per game.

John DeFilippo: Set to interview Friday, an intriguing candidate in that he has been a coordinator for only one year, this past season with the Cleveland Browns. The Browns were 25th in total offense. DeFilippo, 37, did, however, make his bones as a quarterbacks coach in Oakland and with the New York Jets.