The 22 cases documented were during the MGM Resorts International casino’s first two months of operations, before an additional eight cases were reported during November and December in 2018.
MGM Springfield officials have announced they will be taking further measures to prevent this from happening again.
More “under-21” warning signs have been added to the floor, further security has been provided during peak times and community education will be implemented.
MGC Chairwoman Cathy Judd-Stein said: “MGM have taken it very, very seriously. We made it clear it is going to be a very serious concern for us. They have put in new resources to address it.”
MGM Springfield announced last week its gross gambling revenue totalled $21.8m in April, which saw a 15% decrease from March.
MGM Resorts also this week confirmed it had ended talks with Wynn Resorts over the purchase of Encore Boston Harbor; the huge Massachussetts casino property would have set the operator back a reported $2.6bn.