The phrase "a major player during" is correct and usable in written English.
It can be used to describe someone or something that has a significant role or influence in a particular context or time period.
Example: "The company was a major player during the tech boom of the late 1990s."
Alternatives: "a key participant in" or "a significant contributor to".
Lobbying, bargaining, negotiating and cajoling, she was a major player during a particularly unsettled period of European history.
Thus while Slug activity is upregulated in both wounded epithelium and in tumor cells [69-74] [69-74]haSnail been described as a major player during wound haslinot[75-80].
Earlier this year he looked like he might be a major player during the Triple Crown season, but he hasn't won since February, and though he qualified for the Kentucky Derby, he finished 13th, followed by a sixth-place finish in the Grade 3 Ohio Derby.
Indianapolis-based WellPoint, the nation's second-largest health insurer by enrollment, was a major player during the initial rollout of Obamacare.
Massachusetts state Rep. Paul McMurtry, a Democrat who was the primary sponsor of the House bill that passed, said he was surprised the tobacco industry wasn't a major player during the debate.
It has offices in beautiful downtown Baghdad and in scenic Kabul and was a major player in the Balkans during the bad years.
And even more puzzling, the book contains no Contract With America, nor anybody resembling Newt Gingrich, surely a major player on the political scene during those midterm elections, a shooting star whose sudden rise and even more abrupt fall may well be the most compelling political story the baby boomer generation has produced.
He became a major player in the defence world during the 1990s as a former chief executive of Armour Holdings, a US company that got close to the Foreign Office through a UK subsidiary of ex-SAS soldiers that guarded British embassies in Africa and South America.
Until January 2009, he was also on the board of Capmark, a major player in commercial real estate during the bubble that went bankrupt after the crisis.
The time-dependent increase in PPAR β/ δ suggests that PPAR β/ δ may be a major player in functional INS+ cell development during the third INS+ cell differentiation stage.
