it's recored as infinte, but they reall just add what he gave up to your totals for the week
Hes basically saying they would just add the hits and runs to your weeks total. for example:
Say it was Monday and you had John Smoltz go. He let up 2 runs in 9 innings for a 2.00 ERA.
However, you also had Tom Gordon go. He entered the game in the 9th but left after giving up 2 runs, but didnt record an out.
So, they would add Gordons 2 runs to Smoltz's totals, giving you 4 runs in 9 innings pitched. Your ERA would now be 4.
Do you kind of get this now?