Hell there's been a lot more closer games than just 2005 and most the Cathedral-St. X games are competitive games save a few years. Some of the recent Cathedral-St. X scores.
2016: X 34-29. X scored on a late TD drive to take the lead an INT a pass in the endzone late to seal it.
2015: X 31-17. Tied ball game going into the 4th as X pulled away late.
2014: X 27-0. This has been one of the few games where X completely dominated from start to finish
2013: X 15-6. One of the more uglier games I've seen played but close throughout
2012: X 33-27. Cathedral dug themselves in a huge hole in the 1H and came all the way back, just needed one stop they couldn't get
2011: DNP
2010: X 28-24. Cathedral lead most the game at Ballaban and X connected on a bomb with a minute left to win.
2009: X 19-10
2008: X 17-3
2007: DNP
2006: X 23-3. Dominating performance by X in that one with arguably one of their best teams ever in my opinion. (I was a junior this year and that X class of 2008 was unbelievable)
2005: X 24-21
Cathedral hasn't fared well in the W-L column but I think more times than not Cathedral has fared exceptionally well against the Bombers, especially given X has nearly 2.5x the male enrollment. I will say though that I can see this being one of the games that may be a blowout in X's favor. Cathedral this year simply doesn't have the athletes in their secondary to give an elite passer like Wolf fits. Hope I'm wrong but if he gets time to throw it could get ugly.
There has been more than just those games too that were close:
1999: St. X 14 Cathedral 7
- Game played at Indianapolis Arlington Otis Shannon powered in at beginning of 4th to tie the ball game 7-7. St. X mounted a drive to score and make it 14-7 Cathedral had 2 3rd down penalties that really hurt and kept the drive alive.
2000: Cathedral 17 St. X 13
-Cathedral had a spectacular performance from Otis Shannon. Scored the go ahead TD after a huge punt return. St. X mounted another drive similar to 1999. Cathedral stopped St. X 4 straight downs from the 3 yd line to make a goal line stand to win at St. Xavier.
2001: St. X 21 Cathedral 0
-St. X pretty much dominated every facet of the game in Indy. Zach Decatur for Cathedral turned in a great performance but they couldn't find the end-zone
2002: St. X 25 Cathedral 6
-St. X again dominated every facet of the game at St. X.
2003: St. X 23 Cathedral 3
-Cathedral was not a very good team that year, first year going 2 platoon and St. X pretty much dominated in Indy.
2004: St. X 21 Cathedral 14
-The Irish played very well and even had the ball at the end of the game if I remember correctly trying to mount a drive for the tie.