Yes
None
Themselves
Rawlings manufactures the majority of uniforms for teams in Major League Baseball. I do not think that all teams contract Rawlings for uniforms, but I believe that they do have roughly 70% of teams using their uniforms and equipment.
No, the jerseys are provided.
No
2
Yankees
The players get new uniforms for each game!
Oakland Athletics
1918
They wear majestic uniforms on the field