Mariners acquire lefty Marco Gonzales from Cardinals for outfielder Tyler O'Neill

Trade analysis: Mariners deal a top prospect in Tyler O'Neill but leave their biggest hole unfilled

Mariners Flip Tyler O'Neil for Marco Gonzales: Yawn or Yay?

Briefly Scouting Tyler O'Neill - Viva El Birdos

5 trade destinations if the St. Louis Cardinals decide to trade Tyler O'Neill

Cardinals acquire Mariners top prospect Tyler O'Neill for Marco Gonzales

Analysis: Who the Mariners could still look at to fill needs this offseason

Mariners trade prospect Tyler O'Neill to Cardinals for LHP Marco Gonzales - Seattle Sports

Cardinals acquire Mariners top prospect Tyler O'Neill for Marco Gonzales

Marco Gonzales pitches gem in Seattle Mariners' home opener