An 18 wheeler hit two mowing tractors on U.S. 59 in Kendleton on Tuesday afternoon.
The crash happened on the northbound side near the St. Bernard River about 1 p.m.
The 18 wheeler hit the first tractor, pushing it into the second, said the Texas Department of Transportation.
Both workers were transported to the hospital as a precaution.
The truck leaked fuel onto the roadway, officials said.