Recognized as one of the premier 3x3 players on the international scene,[6] he was a member and leader of the French National Team that competed and brought back the bronze medal at the 2017 FIBA 3x3 World Cup.

He was a member of the Redwood Empire 600 points scored in a single season list, and was named Sonoma County League MVP.

He shared the Santa Rosa Press-Democrat's Player of the Year honors with his Oregon State college teammate, Kyle Jeffers.

He scored 13 points, including eight in a 1:31 stretch in the second half, in an upset win versus the number 14 ranked Arizona Wildcats.

He scored 11 points (all in the second half), in 16 minutes played against the number 20 ranked University of Nevada, and he finished the game as Oregon State's leading scorer for that night.

He had the game-winning buzzer-beater 3 point made field goal versus Chico State University (1/11/2008, final score 64–61) in the CCAA conference game.

[11][12] Tsagarakis signed in early May 2008 his first professional contract with the French second-tier division LNB Pro B league regular season runner-up, JL Bourg-en-Bresse.

In his 4 playoff games, as Paris Levallois reached the Pro B semifinals, Angelo averaged 8.5 points and 1.5 assists, in 17 minutes played per contest.

[11][13] Dime & Nike Basketball's "Ballers Network" specialized website selected him as the October 2008 player profile of the month.

Shortly after the start of the regular season, he was a special guest on the second episode of the "Ballin" radio show, on October 27, 2008 (103.5 FM – Grenoble / www.jump-shot.net).

Looking for more responsibilities, for his second full season as a professional, Tsagarakis decided to sign for another Pro B, team, Saint Vallier Basket Drôme.

He helped Saint Vallier Basket Drôme to an all-time best 17–17 win–loss record, as they finished one spot shy of earning a playoff seed.

In the early stages of the Pro B regular season, Tsagarakis was invited onto Frédéric Schweickert's "Carrément Basket" radio show on RTL - L'équipe (10/14/2009).

Considered a potential MVP candidate throughout the season, by specialized websites such as "catch-and-shoot.fr" and "basketactu.com", he unfortunately suffered 2 broken ribs after a blind hit from Denain's power forward Juwann James.

Before that injury kept him off from the court for 8 weeks, Tsagarakis was averaging 15.3 points per game, making him the second leading scorer among all French players in the league.

[11][13] Following up the previous two seasons in the Ain county, Tsagarakis signed with Champagne Châlons Reims Basket, a proven candidate to win a league promotion to the French top-tier level Pro A.

He finished the regular season as the 9th best French nationality scorer in the league, with an average of 12.2 points per game, which earned him his second straight Pro B All-Star selection by the media.

He also shot 88% on free throws, and averaged 1.2 rebounds and 2.2 assists in 22 minutes per game during the same stretch, helping SOMB finish the season with 4 straight wins.

Being the key element of head coach Fabien Romeyer's system, Tsagarakis achieved an individual season in line with his previous standards of play in the Pro B, as he averaged more than 11 points per game.

[15] With Kelsey Barlow and Tsagarakis as top performers, Trikala, although the smallest budgeted team of the league, exceeded expectations, and flirted with making the league's playoffs throughout the second part of the season, surpassing for the first time in the club's history a total of 10 wins in a single season in the Greek's professional elite level.

[17] In August 2017, Tsagarakis followed his head coach from Trikala Aries, Giannis Kastritis, and signed a one-year contract with Lymis[18] He helped the ambitious Kymis club to the best record in its young history in the Greek Basket League, as they finished the regular season tied for 6th place, alongside Lavrio, with a 14 win and 12 loss record.

The team henceforth reached the Greek League’s playoffs for the first time, and matched up with Greece’s powerhouse Olympiacos in the first round.

Known as a winner, Tsagarakis signed a two-year deal with the freshly crowned Greek Third Division national champions, with the dual goal of him helping the club to also win the Greek 2nd Division championship in the club’s attempt to earn a long-awaited for league promotion back to Greece's top-tier league.

He competed at the FIBA 3x3 World Tour for the first time in the summer of 2015, and he quickly established himself as one of the premier 3x3 players on the international scene.

He first won the 3x3 French Open in Clermont-Ferrand (July 25, 2015), then led his Paris team to a third-place finish in the European Prague Masters (8-9 August 2015), where he was named one of the 3 most spectacular players of the tournament.

[23] In the week preceding the World Cup in Nantes, Tsagarakis was named the MVP of the Big 12 International Tournament that was held in Voiron (France), that was won by the French team.

[24] In early July, he also competed with the French team at the 2017 FIBA 3x3 Europe Cup in Amsterdam, finishing 5th, after losing in the quarterfinals against the surprising champion, Latvia.

[25][26] Tsagarakis also participated in the long distance shootout contest and finished second behind the Russian national team player Alexander Zakharov.

[28] Over the summer of 2014, Tsagarakis and his streetball team, Hood Mix 2.0, claimed the Quai 54 crown, which is considered to be one of the best international street ball tournaments in the world.

[31][6][9] After leading Team Paris to a third-place finish in their first ever FIBA 3x3 Masters in Prague (August, 8-9th 2015), Tsagarakis was named one of the 3 most spectacular players of the tournament.