It's time for some geekery with the 2012 US Olympic swimming team, and specifically pertaining to the ages and birthdays of the 49-swimmer roster.
The average age as of today, July 3rd, 2012, is 22 years, 8 days on the women's team and 26 years, 72 days on the men's team. If you add 24 days to those numbers, you will get the averages for the opening ceremonies on July 27th: 22 years, 32 days and 26 years, 96 days, respectively.
In both cases, the median reveals that a few outliers at the upper end of the spectrum (Jason Lezak, Natalie Coughlin) skew the averages upward while the biggest concentrations of athletes are below the average. The median for the women is 21 years, 282 days and the median for the men is 25 years, 37 days. The latter of which is more than a year younger than the average.
The oldest Olympian is Jason Lezak at 36 years, 243 days (make that 267 when the games start);Natalie Coughlin holds that honor on the women's side at 29 years, 346 days when the torch is lit - a stark contrast to the 41-year old Dara Torres that was in the veteran position in 2008.
The titles of youngest man goes to Connor Jaeger from Michigan at 21 years, 94 days when the games begin; about two months younger than his fellow 1500 entrant Andrew Gemmell (21 years, 163 days). For the ladies, Katie Ledecky at 15 years, 136 days is the youngest Olympian we've had since Katie Hoff was 15 years, 61 days when the 2004 Olympics began in Athens.
Olympians this year are born overwhelmingly in the months of February and March. 18 out of our 49 Olympic swimmers (including open water) were born in those two months.
But perhaps that's perfect – because the most predominant zodiac sign of athletes on this year's Olympic team is Pisces, the fish, with 13 out of the 49 athletes falling into that category. That's poetic.
By Zodiac Sign:
| Capricorn | 2 |
| Aquarius | 3 |
| Pisces | 13 |
| Aries | 3 |
| taurus | 4 |
| Gemini | 2 |
| Cancer | 5 |
| Leo | 4 |
| Virgo | 1 |
| Libra | 4 |
| Scorpio | 6 |
| Sagittarius | 2 |
By Month:
| January | 2 |
| February | 8 |
| March | 10 |
| April | 3 |
| May | 2 |
| June | 5 |
| July | 2 |
| August | 5 |
| September | 3 |
| October | 2 |
| November | 5 |
| December | 2 |
There are two twins on this year's Olympic Roster, though neither the matching siblings of Cammile Adams or Shannon Vreeland made the team. Cammile's sister Ashley swam at the Trials and had a great meet; Shannon's sister Michelle is an honor student at Kansas State and took up cheerleading instead of swimming.
There are however two instances of athletes having the same birthday without relation: Jessica Hardy and Tyler Clary were both born on March 12th, though Hardy was two years earlier. Elizabeth Beisel and Tyler McGill were both born on August 18th, except Beisel is only 20 whereas McGill is 24.
For all of the talk about teenage sensations at the Olympic Trials, only 5 Americans will still be teenagers when the Olympics begin: Elizabeth Beisel, Missy Franklin, Rachel Bootsma, Lia Neal, and Katie Ledecky. They're all on the women's side of the meet.
Only a single Olympian has a birthday between the opening ceremonies on July 27th and the closing ceremonies on August 12th: Ryan Lochte will turn 28 on August 3rd. Michael Phelps (June 30th), Lauren Perdue (June 25th), and Kate Ziegler (June 27th).
Most of our Olympians were born during the work week, with only 8 out of 48 being weekend babies. The most common days of birth are Tuesday and Wednesday, with 10 each.
| Mon | 5 |
| Tue | 10 |
| Wed | 10 |
| Thu | 9 |
| Fri | 7 |
| Sat | 4 |
| Sun | 4 |
And if you're ready to really feel old, 18 out of 49 Olympians were born in the 1990′s.