| Player History |
| 12/05/2009 | Drafted in the 2009 first-year player draft (Round 1, Pick 3, 3rd overall Pick) by the Houston Astros. |
| 01/01/2010 | OSA scouting updated ratings (potential): Stuff: 13 (61); Movement: 18 (69); Control: 16 (86). |
| 03/30/2010 | Named the #45 prospect in the ML |
| 08/10/2010 | Pitches a 6-hit shutout against the Bristol Sox with 5 strikeouts and 3 BB allowed! |
| 01/01/2011 | OSA scouting updated ratings (potential): Stuff: 8 (13); Movement: 8 (15); Control: 5 (18). |
| 03/29/2011 | Named the #38 prospect in the ML |
| 03/29/2011 | Was traded by the Houston Astros to the Oakland Athletics, along with C K. Miyake, in exchange for SP J. Blanton. |
| 04/17/2011 | Pitches a 3-hit shutout against the Modesto Nuts with 8 strikeouts and 0 BB allowed! |
| 10/27/2011 | Named the #2 prospect in the ML |
| 11/26/2012 | Received a 1-year contract worth a total of $390,000 through automatic renewal. |
| 11/26/2012 | Was traded by the Milwaukee Brewers to the Oakland Athletics, along with SP C. Thean, MR S. Frias, in exchange for SP F. Liriano, CF S. Arnold, SS B. Porter, $1,000,000. |
| 01/01/2013 | OSA scouting updated ratings (potential): Stuff: 16 (16); Movement: 13 (13); Control: 11 (18). |
| 04/07/2013 | Named the #12 prospect in the ML |
| 06/22/2013 | Pitches a 3-hit shutout against the San Francisco Giants with 12 strikeouts and 1 BB allowed! |
| 08/24/2013 | Pitches a 6-hit shutout against the New York Yankees with 10 strikeouts and 0 BB allowed! |
| 09/01/2013 | Wins the ML AL Pitcher of the Month Award. |
| 10/28/2013 | Won the 2013 Major League World Series with the Oakland Athletics! |
| 11/22/2013 | Received a 1-year contract worth a total of $390,000 through automatic renewal. |
| 01/01/2014 | OSA scouting updated ratings (potential): Stuff: 16 (16); Movement: 12 (12); Control: 16 (18). |
| 07/10/2014 | Suspended 5 games after ejection following a brawl. |
| 07/30/2014 | Strikes out 16 against the Minnesota Twins. |
| 11/23/2014 | Received a 1-year contract worth a total of $6,276,900 through arbitration. |
| 01/01/2015 | OSA scouting updated ratings (potential): Stuff: 16 (16); Movement: 12 (12); Control: 17 (18). |
| 06/26/2015 | Injured (sprained ankle), day-to-day for 2 weeks. |
| 10/28/2015 | Won the 2015 Major League World Series with the Oakland Athletics! |
| 11/19/2015 | Received a 1-year contract worth a total of $7,788,800 through arbitration. |
| 01/01/2016 | OSA scouting updated ratings (potential): Stuff: 16 (16); Movement: 12 (12); Control: 19 (19). |
| 04/13/2016 | Injured (back spasms), day-to-day for 6 days. |
| 05/28/2016 | Pitches a PERFECT GAME against the San Diego Padres, striking out 9 hitters! |
| 11/26/2016 | Received a 1-year contract worth a total of $7,698,300 through arbitration. |
| 01/01/2017 | OSA scouting updated ratings (potential): Stuff: 15 (15); Movement: 11 (11); Control: 18 (18). |
| 03/19/2017 | Signed a 2-year contract extension worth a total of $15,620,000 with the Oakland Athletics organization. |
| 08/22/2017 | Injured (sprained ankle), out for 8 weeks. |
| 01/01/2018 | OSA scouting updated ratings (potential): Stuff: 14 (14); Movement: 11 (11); Control: 17 (17). |
| 06/09/2018 | Pitches a 4-hit shutout against the Los Angeles Angels of Anaheim with 9 strikeouts and 0 BB allowed! |
| 01/01/2019 | OSA scouting updated ratings (potential): Stuff: 13 (14); Movement: 11 (11); Control: 15 (15). |
| 03/25/2019 | Signed a 3-year contract extension worth a total of $12,000,000 with the Oakland Athletics organization. |
| 04/08/2019 | Pitches a 5-hit shutout against the Los Angeles Angels of Anaheim with 5 strikeouts and 0 BB allowed! |
| 06/03/2019 | Injured (finger blister), day-to-day for 2 days. |
| 10/27/2019 | Won the 2019 Major League World Series with the Oakland Athletics! |
| 01/01/2020 | OSA scouting updated ratings (potential): Stuff: 13 (14); Movement: 11 (11); Control: 15 (16). |
| 07/01/2020 | Wins the ML AL Pitcher of the Month Award. |
| 07/12/2020 | Was selected to the 2020 Major League All-Star Game. |