Description: Includes 2019 BBWAA-elected inductees Mariano Rivera, Edgar Martinez, Roy Halladay, and Mike Mussina. 31 variables for each player. Team=primary team; BBWAA=Baseball Writers Association of America; Bat: R=right, L=left, B=both;
WAR=Wins Against Replacement: number of wins the player added to the team above what an "average" replacement player would add.
OPS=On-base Plus Slugging; as a rule of thumb, a "good" OPS is a value that when divided by 3 results in a value that would be considered a "good" batting average.
Other variables are hopefully self-explanatory.