The Sooners’ men’s basketball team was disciplined in 2006 after former coach Kelvin Sampson made more than 550 impermissible phone calls to recruits. The following year, the football program was punished after players including starting quarterback Rhett Bomar received payment for work they didn’t do at a Norman car dealership. Those two major violations landed Oklahoma on probation until next month. Last week, Oklahoma acknowledged it was investigating a report of a possible NCAA rules violation involving basketball player Tiny Gallon. However, it did not release any documents related to that investigation. The documents also show the school self-reported 50 secondary rules violations in the last academic year, many relating to recruiting phone calls and text messages. Among the most recent violations reported were 31 impermissible recruiting phone calls — 16 made and 15 received — by an assistant recruiting coordinator who is no longer employed by the football team and an impermissible text message sent by assistant coach Bobby Jack Wright to a football recruit’s mother.