According to Howard Balzer, the Packers brought in six free agents for tryouts on Monday.
The Packers are reportedly signing Bello to their practice squad (NFLTR) following the workout on Monday.
Hitner, 24, wound up going undrafted out of Villanova back in April. He later agreed to a three-year, $1.755 million contract with the Rams.
However, Los Angeles waived Hitner coming out of the preseason.
During his college career at Villanova, Hitner was a two-year starter, appearing in 28 total games.