Posted by Andy on April 1, 2011
Here on Opening Day we've already had a few games where neither starting pitcher got a decision in the game. I know that's not all that rare, but I got curious to see just how often it happens.
I did a Pitching Game Finder and sorted by most players meeting the criteria, and simply clicked the bubbles for starter and no decision.
For 2010, there were 570 games in which both starters got a no-decision. There were 231 games in which 1 starter got a no-decision and the other starter got a decision. Since there were 2430 total games, that means there were 1629 games in which both starters got the decision.
On a percentage basis, that's 23.5% of games with a double no-decision, 67.0% of games with a double decision, and 9.5% with one of each.
Just out of curiosity, I checked the numbers for Opening Day games. To get a little more data, I went back to 2006 for 5 seasons'-worth of data. There have been 23 Opening Day games in which both starters got no-decisions. There have been 7 games in which one starter got a no-decision. There have been 45 games in which both starters got a decision.
That's 75 total games (which makes sense since there are 30 teams, meaning 15 Opening Day games per year, times 5 years.) It breaks down to 30.6% of games with double no-decision, 60% of games with a double decision, and 9.3% games with one of each.