The team, a member of the New England Collegiate Baseball League, plays its home games at Mackenzie Stadium.

[12] Their first year in Holyoke, the Blue Sox finished just under a .500 record and 8 games behind the division winning and eventual NECBL champions Sanford Mainers.

The 2013 squad advanced to the postseason by winning a play-in game with the Saratoga Brigade before falling 2–1 in the West Division Semifinals to the eventual champions, the Keene Swamp Bats.

Despite winning only 13 games in 2014, the team made a 5-win improvement under Golden in the 2015 season with the help and leadership of newly appointed Manager John Raiola.

In one of the more dramatic playoff games in NECBL history, the Blue Sox led the deciding game-3 2-1 heading into the 8th inning.

A Sam Stauble triple and a Shane Hughes walk off 3-run HR ended the Sox run, but provided the team with a foundation to build to 2017.

The team continued to rack up strong attendance numbers, drawing 2,800 fans+ in five consecutive games headed down the stretch run.

While the 2020 season was cancelled due to the COVID-19 pandemic, 2021 brought a new dawn, as Raiola stepped down as manager in favor of former Blue Sox Outfielder and later hitting coach Hezekiah Randolph.

Below is a list of New England Collegiate Baseball League records set by players of the Concord Quarry Dogs and Holyoke/Valley Blue Sox, as of the end of the 2017 season.