| | | Monday, August 5th, 1912 | | Signed Bob Fisher to a minor league contract with a signing bonus of $520. |
| Saturday, August 3rd, 1912 | | Signed José Zamora to a minor league contract with a signing bonus of $190. |
| Friday, August 2nd, 1912 | | Signed Doc Lavan to a minor league contract with a signing bonus of $260. | | Signed Rube Schauer to a minor league contract with a signing bonus of $190. |
| Tuesday, July 30th, 1912 | | Signed Rafael Pérez to a minor league contract with a signing bonus of $240. |
| Saturday, June 15th, 1912 | | Released SP Sam Leever. | | Placed RF Frank Schulte on the 60-day disabled list. | | Placed SP Otto Hess on the 60-day disabled list. | | Placed SP Dick Braggins on the 40-man roster. | | Purchased the contract of SP Dick Braggins from Triple A Chesapeake. | | Purchased the contract of SS Mark Hampton from Triple A Chesapeake. | | Placed MR Todd Johnson on the PBA Double A 15-day disabled list. | | Placed SP Esteban Delgado on the PBA Double A 15-day disabled list. | | Purchased the contract of 3B Del Paddock from Triple A Chesapeake. | | Demoted 3B Jack Kibble to Triple A Chesapeake. | | Placed RF Swat McCabe on the 40-man roster. | | Purchased the contract of RF Swat McCabe from Triple A Chesapeake. | | Drafted SS Bob Fisher in the 1912 first-year player draft (Round 2, Pick 18, 55th overall pick). | | Drafted SS Doc Lavan in the 1912 first-year player draft (Round 3, Pick 17, 80th overall pick). | | Drafted SP Rafael Pérez in the 1912 first-year player draft (Round 4, Pick 17, 102nd overall pick). | | Drafted MR Rube Schauer in the 1912 first-year player draft (Round 5, Pick 16, 123rd overall pick). | | Drafted SP José Zamora in the 1912 first-year player draft (Round 5, Pick 18, 125th overall pick). | | Drafted SP Sherwood Richardson in the 1912 first-year player draft (Round 6, Pick 12, 143rd overall pick). | | Drafted MR Willie Morgan in the 1912 first-year player draft (Round 7, Pick 12, 159th overall pick). | | Drafted SP Cisco Muñóz in the 1912 first-year player draft (Round 8, Pick 12, 175th overall pick). | | Drafted MR Jerry Velvick in the 1912 first-year player draft (Round 9, Pick 12, 191st overall pick). | | Drafted SP Masashige Kouno in the 1912 first-year player draft (Round 10, Pick 12, 207th overall pick). | | Drafted MR Pat Bohen in the 1912 first-year player draft (Round 11, Pick 12, 223rd overall pick). | | Drafted MR Jim Haislip in the 1912 first-year player draft (Round 12, Pick 12, 239th overall pick). | | Drafted MR Bill Hall in the 1912 first-year player draft (Round 13, Pick 12, 255th overall pick). | | Drafted CL Jorge Vásquez in the 1912 first-year player draft (Round 14, Pick 12, 271st overall pick). | | Drafted MR Al Clauss in the 1912 first-year player draft (Round 15, Pick 12, 287th overall pick). | | Drafted MR Steve Stover in the 1912 first-year player draft (Round 16, Pick 12, 303rd overall pick). | | Drafted MR Tomás Ruíz in the 1912 first-year player draft (Round 17, Pick 12, 319th overall pick). | | Drafted MR Domingo Villegas in the 1912 first-year player draft (Round 18, Pick 12, 335th overall pick). | | Drafted MR Héctor Bruno in the 1912 first-year player draft (Round 19, Pick 12, 351st overall pick). | | Drafted 2B Mike Bishop in the 1912 first-year player draft (Round 20, Pick 12, 367th overall pick). | | Drafted SS Carlos García in the 1912 first-year player draft (Round 21, Pick 12, 383rd overall pick). | | Drafted 2B Juan Aguirre in the 1912 first-year player draft (Round 22, Pick 12, 399th overall pick). | | Drafted SS Tomás Nevárez in the 1912 first-year player draft (Round 23, Pick 12, 415th overall pick). | | Drafted SS Collin Martin in the 1912 first-year player draft (Round 24, Pick 12, 431st overall pick). | | Drafted SS Pedro Martínez in the 1912 first-year player draft (Round 25, Pick 12, 447th overall pick). | | Placed 3B Harry Steinfeldt on the 40-man roster. | | Released 3B Harry Steinfeldt. |
| Saturday, May 4th, 1912 | | Signed Team Trainer António Rodríguez to a 4-year contract extension. |
| Saturday, April 27th, 1912 | | Signed free agent 1B Bill Bradley to a 1-year contract worth a total of $2,360. | | Signed free agent SP Dick Braggins to a minor league contract. | | Signed free agent 3B Tommy Leach to a 1-year contract worth a total of $1,550. | | Signed free agent MR Sam Leever to a 1-year contract worth a total of $1,370. | | Signed free agent CF Roy Thomas to a minor league contract. | | Signed free agent MR Ernesto Ordóñez to a minor league contract. | | Signed free agent SP Chappie McFarland to a 1-year contract worth a total of $1,370. | | Signed free agent MR Clyde Goodwin to a 1-year contract worth a total of $1,520. |
| Monday, January 22nd, 1912 | | Signed free agent 3B Mike Mowrey to a 1-year contract worth a total of $980. |
| Wednesday, January 17th, 1912 | | Signed free agent 3B Cozy Dolan to a 1-year contract worth a total of $2,450. |
| Wednesday, January 3rd, 1912 | | Signed free agent 3B Jack Kibble to a 2-year contract worth a total of $1,666. |
| Monday, December 25th, 1911 | | Signed free agent 3B Tommy Leach to a 1-year contract worth a total of $1,680. | | Signed free agent 2B Miller Huggins to a 1-year contract worth a total of $1,590. | | Signed free agent SP Irv Young to a 2-year contract worth a total of $3,320. |
| Friday, December 15th, 1911 | | Signed free agent 3B Harry Steinfeldt to a 1-year contract worth a total of $2,620. |
| Thursday, December 14th, 1911 | | Signed free agent 1B Bill Bradley to a 1-year contract worth a total of $1,420. |
| Tuesday, December 12th, 1911 | | Signed free agent 2B Johnny Evers to a 1-year contract worth a total of $1,650. |
| Monday, December 11th, 1911 | | Signed free agent 2B Eddie Grant to a 1-year contract worth a total of $1,780. |
| Thursday, November 16th, 1911 | | 2B Miller Huggins becomes a free-agent. | | SP Rick Adams received a 1-year contract through automatic renewal worth a total of $990. | | 3B Harry Steinfeldt becomes a free-agent. | | CF Felix Chouinard received a 1-year contract through automatic renewal worth a total of $833. | | SS Bobby Wallace becomes a free-agent. | | C Hank Gowdy received a 1-year contract through automatic renewal worth a total of $990. | | 3B Del Paddock received a 1-year contract through automatic renewal worth a total of $833. | | 1B Hap Myers received a 1-year contract through automatic renewal worth a total of $990. | | CF Jimmy Barrett becomes a free-agent. | | SP George McQuillan received a 1-year contract through automatic renewal worth a total of $833. | | SS Charlie Miller received a 1-year contract through automatic renewal worth a total of $833. | | SS Andrew Moore received a 1-year contract through automatic renewal worth a total of $833. | | CF Jack Dalton received a 1-year contract through automatic renewal worth a total of $990. | | MR Harry Kane received a 1-year contract through automatic renewal worth a total of $833. | | RF Zaza Harvey becomes a free-agent. | | SS Matsu Hayagawa received a 1-year contract through automatic renewal worth a total of $833. | | CL Hub Pernoll received a 1-year contract through automatic renewal worth a total of $833. | | SS Ed MacTier received a 1-year contract through automatic renewal worth a total of $833. | | SP Jack Hickey becomes a free-agent. | | 2B Eddie Grant becomes a free-agent. |
| Monday, November 13th, 1911 | | RF Ed Hahn received a 1-year contract through arbitration worth a total of $1,572. | | SP Harry Ables received a 1-year contract through arbitration worth a total of $2,000. | | SP Dick Harley received a 1-year contract through arbitration worth a total of $1,666. | | LF Joe Jackson received a 1-year contract through arbitration worth a total of $3,400. |
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