Crossword clues for Starts of some sporting events:CORRIDASporting event that started as a religious ritualFACEOFFSStarts of some sporting eventsTHRILLAStart of a big 1975 sports event?OSAYStarting words at many a sporting event?MARCHMADNESSAnnual sports event that begins with Selection Sunday on 3/15 ... or, cryptically, a hint to the scrambled word found at the starts of 20-, 29-, 37- and 45-Across
