| | | Monday, August 5th, 1912 | | Signed Javier Ledesma to a minor league contract with a signing bonus of $2,000. |
| Wednesday, July 10th, 1912 | | Signed Joe Connolly to a minor league contract with a signing bonus of $4,000. |
| Tuesday, June 25th, 1912 | | Signed José Perales to a minor league contract with a signing bonus of $210. |
| Saturday, June 22nd, 1912 | | Signed Les Mann to a minor league contract with a signing bonus of $580. |
| Friday, June 21st, 1912 | | Signed Wally Pipp to a minor league contract with a signing bonus of $500. |
| Tuesday, June 18th, 1912 | | Signed Bubbles Hargrave to a minor league contract with a signing bonus of $1,280. | | Signed Ernie Herbert to a minor league contract with a signing bonus of $140. |
| Saturday, June 15th, 1912 | | Drafted LF Joe Connolly in the 1912 first-year player draft (Round 1, Pick 8, 8th overall pick). | | Drafted LF Al Scheer in the 1912 first-year player draft (Round 1, Pick 17, 17th overall pick). | | Drafted C Bubbles Hargrave in the 1912 first-year player draft (Round 1, Pick 20, 20th overall pick). | | Drafted LF Eric Younger in the 1912 first-year player draft (Supplemental Round 1, Pick 1, 26th overall pick). | | Drafted 2B Javier Ledesma in the 1912 first-year player draft (Supplemental Round 1, Pick 2, 27th overall pick). | | Drafted LF Les Mann in the 1912 first-year player draft (Round 2, Pick 8, 45th overall pick). | | Drafted 1B Wally Pipp in the 1912 first-year player draft (Round 3, Pick 7, 70th overall pick). | | Drafted SP José Perales in the 1912 first-year player draft (Round 4, Pick 9, 94th overall pick). | | Drafted MR Ernie Herbert in the 1912 first-year player draft (Round 5, Pick 8, 115th overall pick). | | Drafted SP Esteban Álvarez in the 1912 first-year player draft (Round 6, Pick 6, 137th overall pick). | | Drafted MR Pop-Boy Smith in the 1912 first-year player draft (Round 7, Pick 6, 153rd overall pick). | | Drafted SP Larry Raley in the 1912 first-year player draft (Round 8, Pick 6, 169th overall pick). | | Drafted SP Brendan Killy in the 1912 first-year player draft (Round 9, Pick 6, 185th overall pick). | | Drafted SP Armando Berrios in the 1912 first-year player draft (Round 10, Pick 6, 201st overall pick). | | Drafted MR Esty Chaney in the 1912 first-year player draft (Round 11, Pick 6, 217th overall pick). | | Drafted MR Will Clark in the 1912 first-year player draft (Round 12, Pick 6, 233rd overall pick). | | Drafted MR Charlie Grover in the 1912 first-year player draft (Round 13, Pick 6, 249th overall pick). | | Drafted MR Luke Glavenich in the 1912 first-year player draft (Round 14, Pick 6, 265th overall pick). | | Drafted MR Jeff Dorsey in the 1912 first-year player draft (Round 15, Pick 6, 281st overall pick). | | Drafted CL Ta-heng Chu in the 1912 first-year player draft (Round 16, Pick 6, 297th overall pick). | | Drafted MR George Clark in the 1912 first-year player draft (Round 17, Pick 6, 313rd overall pick). | | Drafted MR Carlton Brown in the 1912 first-year player draft (Round 18, Pick 6, 329th overall pick). | | Drafted MR Carl Wareham in the 1912 first-year player draft (Round 19, Pick 6, 345th overall pick). | | Drafted LF Jeffrey White in the 1912 first-year player draft (Round 20, Pick 6, 361st overall pick). | | Drafted 2B Ralph Young in the 1912 first-year player draft (Round 21, Pick 6, 377th overall pick). | | Drafted CF Tim Brooks in the 1912 first-year player draft (Round 22, Pick 6, 393rd overall pick). | | Drafted RF Alejandro Benítez in the 1912 first-year player draft (Round 23, Pick 6, 409th overall pick). | | Drafted RF Max Gill in the 1912 first-year player draft (Round 24, Pick 6, 425th overall pick). | | Drafted LF Merito Acosta in the 1912 first-year player draft (Round 25, Pick 6, 441st overall pick). |
| Saturday, April 27th, 1912 | | Signed free agent LF Jack Hoey to a minor league contract. | | Signed free agent RF Pedro Flores to a minor league contract. | | Signed free agent 1B Kieran Cooper to a minor league contract. |
| Thursday, November 16th, 1911 | | SS Jeremy McFarlen received a 1-year contract through automatic renewal worth a total of $990. | | C Harry Ostdiek received a 1-year contract through automatic renewal worth a total of $990. | | CF Dave Callahan received a 1-year contract through automatic renewal worth a total of $833. | | CF Benny Kauff received a 1-year contract through automatic renewal worth a total of $833. | | MR Ray Boyd received a 1-year contract through automatic renewal worth a total of $833. | | 3B Andy Oyler becomes a free-agent. | | SP Irv Young becomes a free-agent. | | C Roger Bresnahan becomes a free-agent. | | SS Roxey Roach received a 1-year contract through automatic renewal worth a total of $990. | | SP Hack Schumann received a 1-year contract through automatic renewal worth a total of $833. | | 2B Jonathan Tanner received a 1-year contract through automatic renewal worth a total of $990. | | SP Ham Iburg becomes a free-agent. | | LF Jack Cameron becomes a free-agent. |
| Monday, November 13th, 1911 | | 2B Ham Hyatt received a 1-year contract through arbitration worth a total of $1,252. | | RF Steve Evans received a 1-year contract through arbitration worth a total of $3,400. | | CL Jake Thielman received a 1-year contract through arbitration worth a total of $1,250. | | 2B Amby McConnell received a 1-year contract through arbitration worth a total of $1,250. | | SP Ed Summers received a 1-year contract through arbitration worth a total of $3,080. | | LF Josh Devore received a 1-year contract through arbitration worth a total of $1,504. | | SP Ed Killian received a 1-year contract through arbitration worth a total of $1,250. | | LF Jack Lelivelt received a 1-year contract through arbitration worth a total of $1,655. | | SP Jim Moroney received a 1-year contract through arbitration worth a total of $1,250. | | SP Irish McIlveen received a 1-year contract through arbitration worth a total of $1,440. | | 3B Billy Purtell received a 1-year contract through arbitration worth a total of $1,250. | | SP Sam Edmonston received a 1-year contract through arbitration worth a total of $1,250. | | SP Larry Hesterfer received a 1-year contract through arbitration worth a total of $1,250. | | RF Harry Wolter received a 1-year contract through arbitration worth a total of $3,900. | | CF Dode Paskert received a 1-year contract through arbitration worth a total of $4,478. | | SS Stuffy McInnis becomes a free-agent. |
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