Jon, how is it that you are a senior now, but on November 19th you were a junior? (See http://talk.collegeconfidential.com/college-admissions/1937908-can-i-apply-through-common-app-as-a-junior-and-next-year-as-a-senior.html )
The rule of thumb for MIT is “if the student were hit by a bus and couldn’t compete any more, would he still be admitted to MIT?”. The coaches’ “pull” is really more along the lines of independent confirmation of the students’ athletic claims than any ability to admit students in order to field an athletic team.