Sentence:  Twenty-one year old Milt Pappas and Jerry Walker , 22 , are scheduled to share the Oriole mound chores against the Bombers ' Art Ditmar in <WSD>Sunday</WSD> 's 2 P.M. encounter . 
Meaning of the word marked with <WSD> tags:  first day of the week; observed as a day of rest and worship by most Christians