The centre-forward, who spent eight months on the sidelines after suffering a serious knee injury while on loan at Derby County last term, started the development match at the KCOM Stadium yesterday.
Winnall has now featured in back-to-back U23 matches. He marked his return to action by scoring the winner in Wednesday's over Crewe Alexandra last week.
Speaking in a recent interview to The Star, Winnall said:Â "It is going to be a fresh start for me under new management and new staff and I'm really looking forward to it.
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"For obvious reasons, I left last year but now I am back and all I am focused on is getting myself back in the starting eleven, hopefully scoring goals and helping this club to be successful."
Following a long injury lay-off, itÂ is likely the 27-year-old may play one more development match before being considered for first-team selection.
Neil Thompson's side secured maximum points at Hull after a late strike by Liam Waldock.
Meanwhile, the U18s slipped to their first loss of the campaign, losing 3-1 at home to Leeds United yesterday. Jordan O'Brien netted a penalty for the Owls but their West Yorkshire counterparts proved too strong and condemned Wednesday to a first defet in 10 outings.