In 2008, starting pitchers got the win in 69.3% of games.
In 1968, starting pitchers got the win in 78.5% of games.
By this token, a starting pitcher who pitched 40 years ago and won 300 games would only win 265 in today's era. Voters should not be penalizing players who don't make it to 300. Yes, I'm talking about Mike Mussina.