Constructing a good bench is in some respects more challenging than constructing a bullpen because teams need a broad collection of skills, but only have between three and six bench positions. An AL team with a full time DH and a 13 man pitching staff will only have three players on the bench, while an NL team with an 11 man pitching staff will have six players on the bench. Most teams will be somewhere in between. A good bench needs to have players who between them can play every position at about an average level, one pinch runner, one player who can get on base reasonably well, a player with power from the left side of the plate, and one with power from the right side. The challenge of gathering these players is made more difficult because the best players are usually starters so most bench players will have some of these skills, but also have significant weaknesses that prevent them from having starting roles.