Theo Riddick did not take a single regular season snap while with a part of the Broncos in 2019. Theo Riddick spent the entire regular season on the IR.
The Broncos only used two halfbacks in 2019, Phillip Lindsay and Royce Freeman. Devontae Booker had 26 offensive snaps on the year, fewer than either of the other two would get in most single games. Counting Andy Janovich and Andrew Beck, Bronco running backs were targeted 124 times in 2019 (98 of that was Lindsay and Freeman).