2013-14 — Swam collegiate-best time in the 100-fly (57.96) at the Hawkeye Invitational… posted season-best time of 54.45 in 100-free at the Hawkeye Invitational… recorded two top-10 times… academic All-Big Ten… letterwinner.
2012-13 — Swam collegiate best times in the 100 free (53.63), and 100 (56.86) and 200 (2:04.40) butterfly at the Hawkeye Invitational… also clocked a season best time in the 50 free (24.68) at the Hawkeye Invitational… posted four top-five finishes… named Academic All-Big Ten… letterwinner.
2011-12 — Swam collegiate best times in the 50 free (24.51), 100 fly (56.96) and 200 fly (2:04.77) at the Big Ten Championships… also swam a collegiate best time in the 200 free (1:57.92) at the Hawkeye Invitational… named Academic All-Big Ten… recorded seven top-five finishes… letterwinner.
2010-11 — Posted collegiate best times in 100 fly (57.94) at Big Ten Championships, 200 fly (2:06.99) vs. Iowa State, 200 IM (2:08.26) and 50 free (25.04) at the Hawkeye Invitational… recorded 11 top-five finishes… letterwinner.
High School — Holds school records in the 200 IM, 50 free, 100 free, 100 fly, 200 medley relay, and 200 and 400 free relays… four-time team MVP… five-time state qualifier… earned all-state honors in 2009 and was named News-Gazette Swimmer of the Year… earned all-area honors in each of her four seasons… served as co-captain at Danville High School her junior and senior seasons… coached by her mother Jana Drennan… National Honor Society member.
Personal — Born July 9, 1991… daughter of Jana and Troy Drennan… mother swam at Illinois State University… journalism and cinema major.
Drennan’s Collegiate Bests
| Event | Time | Meet | Date |
| 50 Free | 24.51 | Big Ten Championships | 2/16/12 |
| 100 Free | 53.63 | Hawkeye Invitational | 12/2/12 |
| 200 Free | 1:57.92 | Hawkeye Invitational | 12/2-4/11 |
| 100 Fly | 56.86 | Hawkeye Invitational | 12/1/12 |
| 200 Fly | 2:04.40 | Hawkeye Invitational | 12/2/12 |
| 200 IM | 2:08.26 | Hawkeye Invitational | 12/3/10 |