Forsythe, 27, has played parts of the past three seasons with San Diego, hitting .241/.310/.349 in 228 Major League games. He batted .214 with six home runs and 19 RBIs in 75 games last season.
Forsythe told reporters on a conference call that he initially learned that he might be traded Monday night.
"Once the shock got out of the way, it was excitement for me and my fiancée, and we're ready to go," Forsythe said.
Friedman called Forsythe a "versatile infielder that provides really competitive at-bats."
"We feel like various injuries have prevented him from reaching his potential," Friedman said. "We feel like he has an upside on his skill set on both sides of the ball. We feel like that fits us really well. … He plays extremely hard."
Forsythe suffered a torn plantar fascia in his right foot in a Spring Training game during the final week of March, which landed him on the 15-day disabled list and later the 60-day DL to make sure he got enough time off for the injury to heal. He now believes his problems are behind him.
"We addressed the problem right at the end of the season last year," Forsythe said. "The trainers at San Diego, we dealt with it the whole year. So we kind of knew our approach, what would work best at the end of the year."
Forsythe explained that he was given an injection and had his right foot placed in a boot for three weeks.
"Once I had the boot off, the plantar felt great and I kind of just took my time getting back into the swing of things," Forsythe. "I've done therapy the past couple of months and just got slowly back into shape. And it's been great so far. ... The whole thing with the plantar kind of affected everything else, including my knees and hips. So when that feels good, everything else feels good."
The right-handed-hitting Forsythe has a .290 career average, with five home runs and 17 RBIs against left-handed pitching.
Forsythe, who has played second, short, third and the corner outfield spots, will be under team control by the Rays for the next four seasons, with the 2014 season at the league minimum. His addition will strengthen the competition for roster spots for utility players, which Tampa Bay has a great affinity for on its roster. Other players in that mix will include Sean Rodriguez, Jayson Nix and Vince Belnome.
Torres had a coming-out party in 2013, so seeing him dealt is a surprise. In 39 relief appearances last year, Torres posted a 1.71 ERA over 58 innings. Friedman explained that the Rays dealt from an "area of depth to address an area of weakness."
"Left-handers in the bullpen is an area of strength for us," Friedman said. "As we sit here today, we have [Jake] McGee and [Cesar] Ramos. [C.J.] Riefenhauser and [Jeff] Belveau will be in Triple-A, and there are some other guys who are bullpen options."
Tampa Bay selected Hahn in the sixth round of the 2010 First-Year Player Draft. In two Minor League seasons, he is 4-3 with a 2.38 ERA in 34 starts. Hahn missed the 2011 season after undergoing Tommy John surgery on his right elbow.
Boxberger is 0-1 with a 2.72 ERA in 42 Major League games with San Diego. In four Minor League seasons, he is 11-20 with a 3.54 ERA and 21 saves in 170 appearances. Friedman noted that Boxberger has "the potential to be a high-leveraged quality reliever" who can get out hitters from both sides of the plate.
Boxberger was acquired by the Padres in a trade with the Reds in December 2011. The 25-year-old was named San Diego's No. 12 prospect by MLB.com entering the 2012 season. Cincinnati selected him in the first round (43rd overall) of the 2009 First-Year Player Draft out of the University of Southern California. His father, Rod, earned College World Series MVP honors for the 1978 USC national championship squad that went 54-9.
Lollis, 23, is 15-33 with a 4.79 ERA in 149 Minor League appearances. He was selected by the Padres in the 15th round of the 2009 First-Year Player Draft out of Riverside (Calif.) Community College. Friedman said the Rays like Lollis' makeup and because of the stuff he has, he has a "real upside."
Andriese, 24, is 26-16 with a 3.18 ERA in 66 Minor League appearances, 59 of which were starts. San Diego selected him in the third round of the 2011 First-Year Player Draft out of UC-Riverside.
"He does two things that we value quite a bit: the ability to throw strikes and keep the ball on the ground," Friedman said.
Tissenbaum, 22, bats left-handed and has played second, third, first, shortstop and designated hitter. Friedman remarked that Tissenbaum has "excellent bat-to-ball skills."
In two Minor League seasons, Tissenbaum has a .282 batting average, with five home runs and 78 RBIs in 159 games. The Padres selected him in the 11th round of 2012 First-Year Player Draft out of Stony Brook University.