draft saw major changes to the compensation rules. This was implemented as part of the previous CBA between MLB and its players' union, which took effect with the 2012 season. Pre-2013 rules Before the 2013 draft, free agents were ranked by the Elias Sports Bureau based on their previous two years of playing, and against players of similar positions. Players were categorized as either Type A or Type B, or fell into the category of all other players. Below is a description of each free agent class and the compensation the free agent's former team received when the player signed with a different team. A Type A free agent was ranked in the top 20 percent of players at his position. A team that signed a Type A player gave its top draft pick to the club that the player left; that club also received a supplemental pick in the "sandwich" round between the first and second rounds. A Type B free agent was ranked below the top 20 percent but in the top 40 percent of players at his position. A team that lost a Type B player received a supplemental pick, but the signing team did not lose a pick. All other players carried no compensation at all. There had previously been a third class of "Type C" players, but that was eliminated in the 2007 CBA. To earn a compensatory pick, a free agent must have been either signed before the arbitration deadline in early December, or offered arbitration by their former team but still signed with another team. Compensatory picks that one team gave another via this method were the highest available pick that team had, with the exception of picks in the top half of the first round. These picks were protected from being used as compensation. If a team that picked in the top half of the first draft signed a Type A free agent, they would give up their second-round pick. If a team owed two other teams draft picks via Type A free agents, the team whose departing player had a higher score got the higher-ranked pick. A team could not lose picks it earned via compensation. The post-2012 rules for this aspect of the draft are similar, except that the "Type A" and "Type B" designations no longer exist (see below). The order of the supplemental round between the first and