OP, one of the poster above suggested you to take physics SAT, I think you should ask the coaches whether that is necessary. I personally think it is not necessary as you have 800 for Math and a science subject test already, which should satisfy at least MIT and Caltech in terms of SAT testings.
“I think that the depth that has been accomplished in tennis” Not even close, for this level of tippy tops. It’s a great EC. But one sport isn’t breadth. There will be applicants with more collaborative math sci ECs than the two teams and experiences outside the high school (internships or other.) And on top of that, ECs in non-stem, besides one sport, regardless of accolades in that.
The competition for these colleges is so fierce that they won’t just look at the math scores and grades, as replacements for the 4. It may be wise to try. No harm in trying.
The one unknown is what OP actually does for the American Cancer Society. If it’s substantial, hands-on, and with those needing services and support, it can be good. If it falls more into random, not so much. None of this is easy.
OP, for Caltech or MIT, you’re competing with applicants who generally don’t show deficiency in any area, particular physics, perhaps the most consequential part of STEM curriculum in HS. The quality of AP courses, especially physics courses, vary greatly from HS to HS, so the exam scores are used for the purpose of validation. BTW, I don’t think Physics Subject Test will be a sufficient remedy, even if you get a 800. Why don’t you take AP Physics C in your senior year and show the process you’re making when you apply? It may appear to adcom that you’re trying the avoid more advanced physics after getting a 4 in AP Physics 1, fairly or not.
Presumably, you mean stuff like Caltech’s required-for-all first year math course being like MIT’s harder optional first year math course, with MIT’s regular one being easier (and skippable with a high enough AP calculus score).
^Yes, that’s one example. Another is the physics sequence. MIT offers 4 different versions of Physics I and 3 different versions of Physics II for students of varying degrees of preparedness. AP Physics C credits are given for some of the courses. Caltech offers one single course (with two tracks: analytical and practical) and no AP credit.
OP - @lookingforward isn’t being harsh, just real about the level of competition for these schools.
We saw students at my D’s HS with similar test scores, perfect GPAs, and stronger ECs turned down from less competitive schools than what you listed.
You need to be realistic and have match and safety schools that you love on your list as well as these high reaches.
@momofsenior1 Not saying you’re wrong at all and I completely agree, I was just not happy with his/her overall tone and saying stuff like “OP needs to understand what holistic means” – it just felt like a bit too much for me
Tone is hard to infer in writing. I’ve been guilty of coming across too cut and dry but many of us are here on CC to help.
One of my D’s closest friends overreached on his list and was bitterly disappointed to settle for his only safety that the GC made him apply to. I started being active on CC to help others avoid that mistake which is why I’m super big about spending the majority of the time looking for exciting match and safety options because the reaches are just that, reaches for everyone.
It’s hard to remember that at every school across the country there are kids just like you. I do alumni meetings for one of the Ivies and can’t even begin to tell you how impressive these kids are. Year after year I talk to multiple kids just like you, and the vast majority of them are rejected. It doesn’t mean that you can’t be wildly successful, but there are just too many high stat kids applying to the same schools.
And, if you know you want to do chem e, apply for chem e. At some schools (not those that you are asking about but perhaps for your match and safeties), it’s difficult to transfer into a popular major later.
@The1AndOnlyJZ I think that being a high 4 star tennis recruit is a stronger hook than some are giving you credit for. It is rare to find a top 100 player with your academic profile that is willing to gamble on the soft support that coaches at MIT and Caltech can offer. Many of the high 4 stars with your stats will take a guaranteed spot offered by another high academic D3 school rather than rolling the dice.
^Agree that a lot of high academic athletic recruits go that route, but that also usually involves having to commit ED. The other factor to consider with high academic D3’s is that few offer straight engineering programs (Harvey Mudd and Swarthmore are exceptions that come to mind), although many do have excellent science programs with the potential to get an engineering degree with another school in a 3/2, 4/2 type program. The best match/safety route strategy is to apply rolling admissions or EA to some state flagships with great science/engineering programs, perhaps in their honor colleges while applying EA, SCEA or ED to one or more of the original list as their restrictions allow.
Carnegie Mellon and Johns Hopkins would be two more options for OP to consider if he wanted a sure acceptance (provided he had coach support which he would as long as he maintains his top 100 ranking) , but those would also require ED.
What matters is what adcoms want, not how individual posters feel. It’s long been a hot button on CC. I stand behind my comments in post 4. They come from experience. A lot of kids on CC misunderstand holistic. They feel some spikes or all “spikey” is all it takes. The competition is so ridiculus that they review fairly, but it ALL has to be there. As simple as stopping foreign lang can be a flag, even for stem. It’s a no-excuses world.
And, this time of year, I encourage kids to understand how it’s more than stats, how they can fine tune what they can. There are still 5 months to RD deadlines.
If you are an official recruit, fine. If not, why not do what you can to improve your app? Any kid does need to understand what they look for, in order to make his best presentation. It matters to adcoms and they hold your shot in their hands.
@the1andonlyjz Assuming you want to play tennis in college at either MIT or Caltech you will want to ask the coaches directly where you rank on the list they send to admission. Once you have this info, you should ask the coaches how many recruits off the list they expect to be admitted as the number changes from year to year. For example, two years ago, the MIT coach got one 4 star recruit. This past cycle, the coach had 4 recruits accepted. (probably due to the graduation this year of 4 starters). You can research Caltech on tennis recruiting for their history.
This info will help you determine the odds of getting admitted and determining whether you should accept full coach support at another school.
If you are not a recruited athlete, which will be true for some of the schools that you listed- I.e Stanford, then I agree with the other posters who say your ECs lack breadth.
@shuttlebus MIT and Caltech both have 3 recruits graduating in 2020 (the year I graduate from high school) so I’m still hopeful about my chances for coaches to be successful in helping me. I’m definitely in contact with Carnegie Mellon and Hopkins, but honestly applying ED at either school really isn’t worth it for me, as they aren’t really my top choices. There’s a lot of scholarship opportunities that I can try to get at less “brand-name” schools apply early action, as well as other good schools that I could apply to early action, such as MIT, Caltech, UChicago, and Georgia Tech. I understand that this is definitely a risk, but I feel that the opportunities from spreading myself out in early action and then regular decision make the risk worth it, compared to what I gain from committing to a school with early decision.
@lookingforward Just wanted to let you know I got into MIT via Early Action this college app season 
@The1AndOnlyJZ Congrats. I think some here will like to know how you later decide, what your other results are, and if you’ll be playing tennis.
My point- and remember, CC gets hundreds of questions from high performing kids- was that, for holistic and tippy tops, it’s complex to nail an admit. The more awareness and openness, the better.
@The1AndOnlyJZ
I couldn’t help but notice how similar my application is to yours. Check out my chance me thread lol
http://talk.qa.collegeconfidential.com/college-majors/2169661-cs-pre-med-major-switch-possible.html#latest
“OP needs to understand “holistic” and that great stats get you to the door, not necessarily through it”
Well apparently, he did understand holistic, which was, get a coach to support you in the application process.