The home of the Springfield Thunderbirds hockey team and numerous other events is getting one of the biggest one-time investments it’s ever received from the state. Maura Healey says the MassMutual Center will receive $93 million in capital investments, including safety and accessibility improvements and upgrades to the fan experience. The center itself is under the purview of the Massachusetts Convention Center Authority, which recently oversaw the completion of an $80 million parking garage and plaza next door. MassMutual Center General Manager Sean Dolan said the new $93 million comes at a pivotal time for the building and its 100,000 square feet of event space. "What we feel like is - we're primed right now, as a building and Springfield as a destination, to take the next step," he said.