Mets' Brandon Nimmo off to strong start in rehab assignmentNimmo has been "progressing really well" with neck stiffness6/7/2019, 1:44 AMMar 9, 2019; Fort Myers, FL, USA; New York Mets center fielder Brandon Nimmo (9) triples in a run in the fifth inning of the spring training game against the Boston Red Sox at JetBlue Park. Mandatory Credit: Jasen Vinlove-USA TODAY Sports / Jasen Vinlove