The bigger issue isn't the GPA, it's that UT requires students that received below a C in a class at a junior or community college have to re-take that class when they enter UT.
This stems from the state passing a regulation several years ago that Board of Regents schools and the UT system have to accept transfer students that graduate from a BOR community college. What was happening was, many of these students that struggled through community college were failing out of UT because they were entering with little chance of overall success. So the decision was made to not accept classes below a C for credit to graduate.
Here's where that hurts athletes: The NCAA has a "Progression Toward a Degree" requirement that says, to be eligible, a player has to have a certain percentage of credits toward graduation in a specific major after their 2nd, 3rd and 4th (in case of redshirts) years to remain eligible for the next year. JuCo kids don't have the requirement coming in (after second year), but they have to get there by the end of their first year. For most guys, that's no problem, even if they struggle a little bit coming in.
Most JuCo guys that come in do so either in January or in time for summer school. If they have to re-take classes to satisfy UT's requirement, they get those knocked out during spring or summer and are fine for progression toward a major with fall and the following spring classes. When players, like the one mentioned in your post, don't arrive until fall, then have to re-take classes, it is very difficult for them to meet the NCAA's standards after the first year.