Final answer:
The theme of the passage about Tanner's experience in a baseball game is that being honest has its rewards, as shown when an umpire trusts Tanner due to his previous display of honesty.
Step-by-step explanation:
The theme of the passage where Tanner showed honesty during a baseball game, leading an umpire to trust his word, is 'It pays to be honest'. This central message is illustrated when Tanner, after demonstrating honesty in a previous game by admitting he did not tag a runner, is believed by the same umpire in a later game when a call is questioned. The umpire's decision to trust Tanner and reverse her call despite the anger of coaches and parents underscores the benefit and value of maintaining integrity.