Midlands Area champion Jason Welborn suffered a shocked defeat in Walsall as the 30 year-old succumbed to wily journeyman William Warburton over six rounds.
Referee John Lathom carded 58-57 at the end of the contest to hand Welborn the fifth loss of his career and the first since a competitive points loss to now-retired ex-world title challenger Matthew Macklin last October.
Atherton’s Warburton, 29, improved to 19-96-8 in what was his 123rd professional outing, adding to a previous best win over Amir Unsworth in 2011 and a draw with Ireland’s Dean Byrne in May 2015.
Also on the bill, ex-British champion Martin Gethin scored a four-round points win over Fonz Alexander whilst Ricky Hatton-trained heavyweight puncher Nathan Gorman made it three knockouts from four wins by halting Kamil Sokolowski in the fifth.
Kieran McLaren, Sam Evans and kickboxer-turned pugilist Chad Sugden all stayed undefeated at the Banks’s Stadium.
In the US, heavyweight Andy Ruiz Jr continued his push for an imminent world title shot by defeating Ray Austin for a 27th win without loss – on the undercard to Toka Kahn Clary’s 19th straight victory since entering the paid ranks.
Providence southpaw Clary took Nicaraguan Orlando Rizo out in four rounds of a schedule ten on top billing of further triumphs for undefeated trio Esquiva Falcao (middleweight 14-0), Saul Rodriguez (lightweight 20-0-1) and Arnold Barboza Jr (welterweight 12-0).