The Tampa Bay Lightning's acquisition of Dan Boyle in 2002 remains a significant moment in franchise history, with ripples that continue to impact the team today. On January 7, 2002, then-Lightning general manager Jay Feaster sent a 2003 fifth-round draft pick to the Florida Panthers in exchange for Boyle. At the time, this move appeared to be a minor transaction, but it would soon become one of the most important trades in Lightning history.

Prior to joining the Lightning, Boyle, an undrafted college free agent from Miami University, played for the Florida Panthers, spending time in both the AHL and NHL. While he showed promise, he hadn't yet reached his full potential. In 129 NHL games with the Panthers, Boyle didn't quite translate his offensive capabilities, which he had displayed in the NCAA and AHL, to the NHL level.

Upon arriving in Tampa, Boyle found his stride. He quickly became a key player on the Lightning's blue line, averaging over 22 minutes of ice time per game and providing a much-needed top-pairing defenseman. Boyle's offensive skills flourished in Tampa, as he recorded 20 points in 41 games after being traded to the Lightning during the 2001-02 season. In his first full season with the team in 2002-03, he tallied 13 goals and 53 points.

Boyle was an integral part of the Lightning's 2004 Stanley Cup-winning team. That year, he recorded 39 points in 78 games and led the team's defense in scoring. His contributions were crucial to the Lightning's success, solidifying his place in franchise history. He was a two-time NHL All-Star and the star of the Lightning defense for years. The Lightning made the playoffs every year Boyle played for Tampa, except his injury-plagued final year.

Despite Boyle's success and a six-year, $40 million contract extension signed in February 2008, his time with the Lightning came to an abrupt end. The franchise was in financial distress and was sold to new ownership in June of that year. The new management, eager to reduce salary expenses, pressured Boyle to waive his no-trade clause.

On July 4, 2008, the Lightning traded Boyle and Brad Lukowich to the San Jose Sharks in exchange for Matt Carle, Ty Wishart, a 2009 first-round pick, and a 2010 fourth-round pick. While the move was unpopular at the time, it ultimately benefited the Lightning in the long run.

The first-round pick acquired in the Boyle trade was used to select Victor Hedman in the 2009 NHL Entry Draft. Hedman has since become a cornerstone of the Lightning's defense, leading them to multiple Stanley Cup championships. Furthermore, it has been argued that had the Lightning kept Boyle, their performance may not have been poor enough to warrant the high draft pick necessary to select Hedman. The 2010 fourth-round pick was used on Jimmy Mullin.

Dan Boyle played for the San Jose Sharks and New York Rangers after leaving Tampa Bay. He retired from the NHL on October 5, 2016, with 164 goals and 605 points in 1,093 games.

Looking back, the Dan Boyle trade is a complex chapter in Tampa Bay Lightning history. While trading him away to the Sharks was not a well-liked transaction at the time, it ultimately led to drafting Andrei Vasilevskiy. The initial acquisition of Boyle for a mere fifth-round pick was a steal that helped the Lightning win their first Stanley Cup. However, the subsequent trade of Boyle to San Jose, though difficult, paved the way for the arrival of Victor Hedman, solidifying the team's defense for years to come.