Oklahoma fired offensive coordinator Seth Littrell after the Sooners dropped three of their first four games in Southeastern Conference play, multiple media outlets reported Sunday.Littrell also served as quarterbacks coach, a position that will now be held by Kevin Johns, according to ESPN. Multiple outlets reported that co-offensive coordinator Joe Jon Finley will be calling plays from now on.In its first season in the SEC, Oklahoma is 4-3 overall, most recently falling 35-9 to visiting South Carolina on Saturday.