In addition to his laminated goods and novelty businesses, Prentice would spend much of the next two decades developing a baseball statistical metric he called "Batting Worth Average" or "BWA". He claimed this measure to be a more comprehensive metric than conventional batting average, as that does not include walks or sacrifice bunts. Prentice reported BWA took into consideration slugging percentage and other factors, as well as timing of hits with base runners, not lowering the score when an out for the batter advanced another player on a base. When this formula was applied to multiple historical games, Prentice claimed it better represented the odds for the outcome. For the 1978 American League East tie-breaker game, the team batting averages were .229 Yankees, to .306 Red Sox, while the BWA was .306 Yankees to .290 Sox. Prentice claimed that after reviewing in excess of 1000 games, the team with the higher BWA entering the game won 100% of the time. Stating in interviews that his system could be explained in 30 minutes, he hoped it would be taken up by general managers, but never did disclose it to the press. His aspirations to follow in the footsteps of Bill James's sabermetrics would ultimately never prove successful.