How many 7th games did he win? More than half the HOF pitchers.
The era of divisional play began in 1969, and the MLB postseason has been extended repeatedly since then. Today, a team that qualifies for the postseason as a wild card entrant and goes all the way to a Game 7 in the World Series can play a total of 20 games in a single postseason.
This is why almost every postseason record in MLB has been established in the last 15-20 years.