![Looking back on the Cardinals Marco Gonzales-Tyler O'Neill trade](https://cdn.theathletic.com/app/uploads/2020/01/07144246/GettyImages-1155823288-e1578426204742.jpg)
Cardinals 2020 breakout candidate: Tyler O'Neill - The Athletic
![Looking back on the Cardinals Marco Gonzales-Tyler O'Neill trade](https://cdn.vox-cdn.com/uploads/chorus_image/image/66243830/usa_today_13373272.0.jpg)
Mariners sign Marco Gonzales to four-year, $30 million extension with club option for 2025 - MLB Daily Dish
![Looking back on the Cardinals Marco Gonzales-Tyler O'Neill trade](https://static.wixstatic.com/media/6fdd48_620018f5bcd14183a3781d8ca52fc0f2~mv2.jpg/v1/fill/w_600,h_422,al_c,lg_1,q_80,enc_auto/6fdd48_620018f5bcd14183a3781d8ca52fc0f2~mv2.jpg)
The emergence of Tyler O'Neill
![Looking back on the Cardinals Marco Gonzales-Tyler O'Neill trade](https://www.thenewstribune.com/sports/mlb/seattle-mariners/e3lrqw/picture207764589/alternates/FREE_1140/marco%202)
Gonzaga's Marco Gonzales could be the key to vaulting Mariners' starting rotation
![Looking back on the Cardinals Marco Gonzales-Tyler O'Neill trade](https://img.mlbstatic.com/mlb-images/image/private/t_16x9/t_w1024/mlb/i5ylfz8nmnaa3t3qplvr)
Adam Wainwright, Tyler O'Neill help Cardinals end skid
![Looking back on the Cardinals Marco Gonzales-Tyler O'Neill trade](https://img.mlbstatic.com/milb-images/image/private/t_w1024/t_16x9/milb/dclho0w45iw7ox5lerol)
Seattle Mariners, St. Louis Cardinals swap Tyler O'Neill, Marco Gonzales
![Looking back on the Cardinals Marco Gonzales-Tyler O'Neill trade](https://www.thenewstribune.com/latest-news/ahbfq4/picture260473457/alternates/FREE_1140/220415%20pc%20bsb%20sea%20hou_1452.jpg)
Marco Gonzales pitches gem in Seattle Mariners' home opener
![Looking back on the Cardinals Marco Gonzales-Tyler O'Neill trade](https://cardinalsnation247online.files.wordpress.com/2019/01/img_6951.jpg)
St. Louis Cardinals: What to do with Tyler O'Neill – Cardinals Nation 24/7
![Looking back on the Cardinals Marco Gonzales-Tyler O'Neill trade](https://images.seattletimes.com/wp-content/uploads/2017/07/07212017_Marco-Gonzales_100826_tzr.jpg?d=780x501)
Mariners acquire lefty Marco Gonzales from Cardinals for outfielder Tyler O'Neill
![Looking back on the Cardinals Marco Gonzales-Tyler O'Neill trade](https://smartcdn.gprod.postmedia.digital/vancouversun/wp-content/uploads/2017/07/peter-orr-celebration.jpg?quality=90&strip=all&w=400&sig=sqGsKCoVKzPPEgapxiBwMg)
Maple Ridge's Tyler O'Neill reunited with Stubby Clapp after M's-Cardinals trade
![Looking back on the Cardinals Marco Gonzales-Tyler O'Neill trade](https://bloximages.newyork1.vip.townnews.com/stltoday.com/content/tncms/assets/v3/editorial/7/de/7de46b86-e07c-11ed-a0f9-4b68b1aa3593/64432fba18b88.preview.jpg?crop=1753%2C920%2C0%2C130&resize=1200%2C630&order=crop%2Cresize)
One-time Mariners prospect Tyler O'Neill's trade to Cardinals was 'wakeup call' for him