Entering into the 2013 season, Gumbs, despite missing the final two months of the 2012 season after suffering a strained left triceps muscle, was widely considered one of the top prospects in the organization.
The California native began the 2013 season in the Florida State League where he posted zero home runs, 11 RBIs and a batting average of just .214.
"Coming from Tampa, the energy level wasn't there," Gumbs explained. "Now coming to Charleston, being with this team and they are a winning team the energy level is much higher.
"It really does affect your performance during the same and I've truly learned how much more important energy level is."
According to Gumbs, he admits to being frustrated about being back in Charleston yet anticipates that he will finish strong as the season advances.
"I am a bit disappointed, but right now I just feel like I need to go out there and do what I do best," Gumbs stated. "There has been a sense of that right when I got off the plane and touched down here and met them up in Rome."
So far this season with the RiverDogs, Gumbs has recorded a batting average of .222 and five RBIs in nine games.
"I feel like I have been doing well," Gumbs admitted. "I have been good at bat and getting into hitter's count a lot of times, drawing more walks than I usually do which is huge for me because I really care about that.
"Other than that, I have been really working hard and it has paid off because I have been putting the ball in play often."
RiverDogs hitting coach P.J. Pilittere was impressed with how Gumbs began to work on his game immediately after arriving in Charleston.
"I think he has done a good job," Pilittere remarked. "His attitude is very professional and he has been here to work hard every single day.
"He has done a great job at bringing intensity to our ball club. He definitely makes us a better team."
Overall, Gumbs has begun to hone in on his weaknesses and feels as if by doing so that success is inevitable.
"Defensively, bunt coverage and I just need to be more aware and ready for that," said the youngster. "Offensively, just continue to swing at good pitches and get a get a good pitch to hit, something I can do something with."
Pilittere, who is optimistic about his player, said he expects a quality season from him where he will play hard and not let coming back to Charleston affect his game negatively.
"We have been making sure Angelo is in a good, strong position nice and early," explained the hitting coach, "trusting his hands which are very fast and just stressing to him that he needs to get a good pitch to hit.
"He has some of the fastest hands in the organization," Pilittere continued. "But that strength of his won't mean anything if he doesn't focus on getting a good pitch to hit."