Hinder the progress of, check, as in His illness threw his schooling back a year, or The troops were thrown back by a barrage of fire. [First half of 1800s]
Revert to an earlier type or stage, as in That dog throws back to his wolf ancestors. This usage gave rise to the noun
throwback, a reversion to a former stage or type. [Second half of 1800s]
throw back on. Cause to depend on, make reliant on, as in When the violinist didn't show up, they were thrown back on the pianist. [Mid-1800s]