[2] Walsh Jennings and teammate Misty May-Treanor were the gold medalists in beach volleyball at the 2004, 2008 and 2012 Summer Olympics.

For most of her career she played with partner Misty May-Treanor, forming the most successful beach pairings in AVP history.

[16] In 2010 May-Treanor and Walsh extended a winning streak to 112 matches before losing to Olympic teammates Elaine Youngs and Nicole Branagh in the AVP Crocs Cup Shootout in Ohio.

She went on to break the career record for most wins by a female professional volleyball player when she won the FIVB Grand Slam in Xiamen, China.

[19] In semi final action (August 27, 2016) Walsh Jennings and Ross played against Chantal Laboureur/Julia Sude of Germany and won in straight sets (21–17, 21–16).

In the finals Walsh Jennings/Ross defeated Spain's Liliana Fernández Steiner and Elsa Baquerizo McMillan in straight sets (21–16, 21–16) to win the gold medal.

[23][24] Walsh played in the 2000 Summer Olympics as an opposite hitter on the U.S. women's indoor team, earning a fourth-place finish.

[25] She missed several of her first games due to a false positive on a drug test, which indicated a suspicious epitestosterone to testosterone ratio.

[27] The pair faced China in the semi-finals, where they won a hard-fought victory over Xue Chen and Zhang Xi 22–20, 22–20 to reach the finals.

[27] In an all USA final they defeated fellow Americans Jen Kessy and April Ross, 21–16, 21–16 to win the gold medal.

The pair reached the semi-finals, where they fell to Brazil's Ágatha Bednarczuk and Bárbara Seixas in two hard fought sets, (22-20, 21–18).

[28] In the bronze medal match, Walsh-Jennings and Ross faced the number one ranked team of Larissa França/Talita Antunes from Brazil.

[29] In February 2006, Walsh Jennings had a guest-starring role in an episode of CSI: Miami along with several other AVP Volleyball players.

Walsh Jennings also appeared alongside her volleyball partner Misty May-Treanor on the show Shaq Vs. in August 2009.

[31] Walsh appeared in the twelfth season of Hell's Kitchen where she gave the team challenge winner a private volleyball lesson.

In the wake of the outbreak of COVID-19, Walsh has expressed disagreement with mask mandates resulting in criticism from those who believe such protests help the spread of the disease.