It had to be tougher than it looked for George Seifert to take over as 49ers head coach from Bill Walsh. After all, Walsh was the primary architect in the 49ers' rise to NFL king of the hill.

720, 1936-42), and Allen. Sirianni won the 2nd-most regular-season games with an NFL head coach in their first four career years, behind George Seifert (52-12, .813). He also joins Seifert (three ...