One-time Mariners prospect Tyler O'Neill's trade to Cardinals was
Canadian slugger Tyler O'Neill gets majors promotion to Cardinals
Mariners trade top prospect O'Neill - Langley Advance Times
Mariners trade prospect Tyler O'Neill to Cardinals for LHP Marco
Tyler O'Neill's return to Seattle offers opportunity to reevaluate trade
Seattle Mariners Offseason Primer: Who could be on their radar
Briefly Scouting Tyler O'Neill - Viva El Birdos
Detroit Tigers trade target: Tyler O'Neill
Cardinals acquire Mariners top prospect Tyler O'Neill for Marco
What if the Mariners traded FOR Tyler O'Neill this time?
Mariners Trade Tyler O'Neill to Cardinals for Marco Gonzales
If Tyler O'Neill becomes available, he'd fit perfectly on the Blue