Undefeated heavyweight prospect Shane Del Rosario (9-0) will attempt to extend his unblemished streak when he faces fellow heavy hitter Lolohea Mahe (4-1-1) in the main event of a STRIKEFORCE Challengers Mixed Martial Arts (MMA) fight card at Comcast Arena at Everett, live on SHOWTIME® at 11 p.m. ET/PT (delayed on the West Coast), on Friday, July 23.