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The Buffalo Bills have requested permission from the 49ers to interview offensive coordinator Greg Roman for their head-coaching vacancy.
Roman will interview with the Bills on Friday or Saturday, according to a source. ESPN was the first report Buffalo requested permission to speak with Roman, Philadelphia offensive coordinator Pat Shurmur and Cleveland offensive coordinator Kyle Shanahan.
The Bills vacancy was created last week when coach Doug Marrone exercised an opt-out clause in his contract after his second season.
Roman, along with the rest of the 49ers coaching staff, remains under contract to the team for next year. But Roman will not be back next season. The 49ers granted him permission last week to interview for the Tampa Bay offensive coordinator job. He is also expected to be up for other offensive coordinator positions if the Bills do not hire him.
Roman will be the third 49ers assistant to interview for head-coaching jobs since the end of the regular season. Defensive coordinator Vic Fangio interviewed last week for the 49ers’ opening to replace Jim Harbaugh, and tight ends coach Eric Mangini interviewed with the Raiders on Monday.
Roman was considered one of the hot coaching candidates the past three seasons, but the 49ers’ deep runs in the postseason might have complicated his ability to land other jobs.
In Week 5 of 2012, Roman's offense rolled up 311 yards rushing and 310 yards passing -- becoming the first team in NFL history to account for 300 yards or more on the ground and in the air -- in the 49ers' 45-3 victory over the Bills at Candlestick Park.
He came under fire this season when the 49ers’ offensive line struggled and quarterback Colin Kaepernick’s production took a step backward. The 49ers ranked 20th in the league in total yards and 25th in points scored.