Carlos Daniel Silveira da Graça (born 5 January 1988), known as Kay, is a Cape Verdean professional footballer who plays as a centre back.

Born in Nossa Senhora da Luz (São Vicente), Kay spent the first seven years of his senior career in Portugal, also playing youth football in the country with S.L.

[2] He competed in lower league or amateur football until the age of 24, representing G.D. Tourizense,[3] Grupo Desportivo Tabuense, S.C. Mineiro Aljustrelense and CD Operário.

[15] Kay earned his first cap for Cape Verde on 8 June 2013, in a 2–1 home win over Equatorial Guinea for the 2014 FIFA World Cup qualifiers (later awarded 3–0).

[16] Selected for the 2015 Africa Cup of Nations finals by manager Rui Águas,[17] he was an unused squad member in an eventual group stage exit.