James Hook's second stint with the Ospreys started with a 21-14 pre-season defeat by Leicester in Bridgend.
Hook came on as a second-half replacement at full-back while new signing from Cardiff Blues Cory Allen came on in midfield.
Ospreys scored tries by wing Jay Baker and number eight Dan Baker with two conversions from fly-half Luke Price.
Leicester's try scorers were Jonah Holmes, Harry Thacker and Jake Kerr with Joe Ford adding three conversions.
Ospreys: D Evans; T Williams, J Thomas, O Watkin, J Baker; L Price, T Habberfield (capt); P James, S Otten, M Fia, L Ashley, B Davies, J Ratti, O Cracknell, D Baker.
Replacements: I Phillips, R Jenkins, D Arhip, A Beard, J Cole, B Leonard, C Allen, J Hook, R McCusker, R Jones, W Jones, M Aubrey, B John, P Jones.