Tony Carruthers

Christa Pike's attorneys are calling on Tennessee to commute her death sentence after her failed execution ... saying Pike was actually helping the execution team try to place her IV lines. Randy Spivey and Stephen Ferrell both urged the state to take another execution attempt off the table…

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.…