Additionally, he earned the Stewart Lindsay, Jr. Award for the Outstanding Attackman in Division I high school lacrosse.

He earned third-team All-American honors after his first college season and was named first-team All-Ivy League.

Pannell led the team in postseason scoring with 16 points over four games, including a six-point effort against the University of Virginia in the semifinals.

His 89 points in 2011 led all players in the league, but Cornell only made it to the second round of the NCAA tournament before losing to Virginia 13-9.

Before the start of his senior season at Cornell, the New York Lizards selected Pannell with the first overall pick in the 2012 Major League Lacrosse Collegiate Draft.

Pannell applied to the Ivy League for a fifth year of eligibility as he did not graduate after the spring semester in 2013 due to taking an incomplete credit in one of his classes.

Pannell returned to Cornell University for the spring semester in 2013 and was eligible to participate in the 2013 lacrosse season.

Cornell made it to the semifinals of the 2013 NCAA championship, losing to the eventual champions Duke University 16-14.

Pannell set the record of 354 all-time career NCAA points in the game, passing Matt Danowski.

[10][11] The record stood until 2015 when it was broken by Albany attackman Lyle Thompson, who finished his senior year with 400 career points.

[13] After the end of the season he was named one of the five finalists for the Tewaaraton Award, which is annually presented to the most outstanding American college lacrosse player.

The award was founded by The University Club of Washington, DC and is presented every year by The Tewaaraton Foundation.

During his second year with the New York Lizards, Pannell was selected to his second All Star game appearance as named an MLL All-Pro.

Pannell was inducted into the Suffolk Sports Hall of Fame on Long Island, New York, in the Lacrosse Category with the Class of 2015.

Pannell played in 13 games with the New York Lizards, breaking his own single season scoring record with 78 points on 43 goals and 35 assists.

During January 2018, Pannell officially was named to the USA Men's Lacrosse team that competed at the World Games in Israel during July.

During 2016, Pannell signed a five-year deal with New Balance/Warrior to be the lacrosse player image associated with its new Warp stick technology.

During 2018, Pannell formed the Attack Academy (theattackacademy.com) that focuses on offensive skill development for youth players through camps, clinics and small group training sessions across the country.

As of May 2019, Pannell also began a career as an insurance broker for the Whitmore Agency in Garden City, New York.

He has an older sister, Genevieve, and a younger brother, James, who plays for the Atlas Lacrosse Club in the PLL.