The doctor who oversaw Christa Pike‘s failed execution in Tennessee also presided over another botched attempt back in May … making him 0-for-2.

Dr. Mark Fowler — who oversaw the administration of 2 lethal injections to Pike — supervised the called-off execution of Tony Carruthers on May 21.

The Carruthers execution was stopped in its tracks after medical staff spent more than an hour trying — and failing — to insert a needle to establish a backup IV line and central line too … NBC News reported.

In Carruthers’ case … the medical team was successful in setting up a primary IV line … but according to state execution protocol, a backup line is also required.

According to legal records, Dr. Fowler had reportedly not placed a central line in 13 years prior to Carruthers’ scheduled execution. Carruthers’ attorney said he was bleeding from his puncture wounds … NPR reports. He is now partially paralyzed.

Leading up to Carruthers’ failed execution … his legal team said they were not given assurances that expired drugs wouldn’t be used.

As you know … Pike was administered 2 lethal injections Wednesday night that made her lose consciousness and start snoring.