HS Softball Lineup

High school softball (NFHS) lineups: the DP/FLEX explained

High school softball uses the NFHS rulebook, and its signature feature is the DP/FLEX — the softball equivalent of a designated hitter, but with a twist that trips up a lot of coaches. Getting it right means understanding that the DP and FLEX are a linked pair, and that moving one of them can quietly end the other's game.

The High School Softball builder is built around the DP/FLEX. It keeps the pair linked, tracks re-entry, and flags the illegal moves the NFHS rulebook does not allow — so you can use the DP/FLEX to your advantage without accidentally burning a player.

How the DP/FLEX works

Under NFHS Rule 3-3-5, the DP (designated player) bats for one defensive player, the FLEX, who plays defense but does not bat. The two are locked together in one lineup slot. The DP may also play defense for anyone, and may take the FLEX's defensive position — but doing so ends the FLEX's game. The builder makes that pairing explicit so you always see who is tied to whom.

Re-entry

Any starter, including the FLEX, may leave and re-enter once, returning to the same lineup position. A substitute who is removed may not re-enter. Because the DP/FLEX pairing interacts with re-entry, the builder tracks each player's status so you know who can still come back.

Courtesy runners

A courtesy runner is allowed for the pitcher and catcher, and does not count as a substitution. It keeps your battery fresh without spending a re-entry.

Coaching tips

• Remember the DP and FLEX are one slot, not two — if the DP takes the FLEX's defensive spot, the FLEX is out of the game.
• Set the DP and FLEX before the game and let the builder track the pairing; changing it mid-game is where most illegal-lineup mistakes happen.
• Use courtesy runners for the pitcher and catcher to protect them without spending a substitution or re-entry.

Frequently asked questions

What is the difference between the DP and the FLEX?

The DP hits (and may play defense); the FLEX plays defense and does not hit. They share one lineup slot. If the DP takes over the FLEX's defensive position, the FLEX leaves the game.

Can the FLEX re-enter after leaving?

Yes, once — like any starter, the FLEX may re-enter one time to the same position. A removed substitute cannot re-enter.

This is general guidance for coaches. Playing-time and substitution rules change season to season and vary by local league — always confirm against the current official rulebook before you finalize a lineup.