Leighton Accardo, 9-year-old daughter of Mets assistant pitching coach Jeremy Accardo, dies after cancer battle'Her courage and bravery inspired us all'11/25/2020, 4:31 AMAlex SmithEditorial ProducerNov 16, 2019; Glendale, AZ, USA; Cancer patient Leighton Accardo joins the Arizona Coyotes during the national anthems prior the first period against the Calgary Flames at Gila River Arena. / Joe Camporeale-USA TODAY Sports