Wilson for a near-post attempt that was easily fielded by Lee-Barrett.
An Andreas Pereira free-kick deflected off the wall but failed to trouble Lee-Barrett with 11 minutes left and injuries to Bolton substitute Conor Wilkinson and Wilson did not aid a quest for further goals. However, Kelly's 85th-minute shot dipped over Joel Castro Pereira's bar and, soon afterwards, a free-kick from the right was touched in by an unmarked Clough at the near post.
Rothwell scooped off target from a Pearson pass and, when Andreas Pereira was flagged offside in the dying seconds, a shoot-out was required to decide the victors. Reece James' shot over the bar proved to be the only penalty miss with Andreas Pereira, Guillermo Varela, Rothwell and Charni Ekangamene all finding the net. Clough, Hall, Josh Vela, Tom Walker and Oscar Threlkeld all beat Joel Castro Pereira to set up a semi-final date with Wigan Athletic.
United: J.Pereira; Varela, Thorpe, McNair, James; Janko, Pearson, Rothwell, Ekangamene, A.Pereira; Wilson (Rowley 81). Subs: Gollini, Weir, Rudge, Harrop.