The race for traditionally blue House District 125 has come down to Republican Fred Rangel and Democrat Ray Lopez. They were the top two finishers in the initial five-way contest earlier this month.
Rodriguez gave up the seat last month to become a Bexar County commissioner.
Before the HD-125 special election runoff, there will be another such contest March 5 in House District 145. There, Democrats Christina Morales and Melissa Noriega are on the ballot for the seat previously held by now-state Sen. Carol Alvarado, D-Houston.
Early voting for the HD-125 special election runoff begins March 4.