From A Wiki of Ice and Fire
|Book(s)|| A Feast for Crows (mentioned)|
A Dance with Dragons (mentioned)
A Feast for Crows
Ser Manfryd is part of Ser Daven Lannister's force at the siege of Riverrun. Manfryd and Ser Raynard Ruttiger command the guard on the boom and nets across the Red Fork to prevent any escape from Riverrun during the siege.