The young defender made an 11-minute cameo in the MLS expansion side's 2-0 home win over the New England Revolution on Sunday.
Facey, 20, joined City’s sister club on a loan deal until June 30 earlier this month, having impressed while on trial during preseason, although he failed to make the bench for their season-opening 1-1 draw at fellow expansion side Orlando City SC.
The promising defender was among the substitutes for their first-ever home fixture on the weekend, however, and entered the match in the 79th-minute for right-back Josh Williams, who was on a booking with the team holding a narrow 1-0 lead.
A nervous finish was avoided in the end, though, after fellow substitute Patrick Mullins added to David Villa’s first-half strike within seconds of coming on when he slid in the Spaniard’s cross in the 84th-minute to ice the result.
Having played a small part in their first-ever victory in front of a 43,507-strong crowd, Facey was understandably buoyed after the match, with the youngster taking to Twitter to celebrate a day full of landmarks.
Proud to make my debut infront of 43 thousand today a dream come true!!! U Fans are amazing thanks guys for your messages too #NYCFC !!— Shay Facey (@ShayFacey) March 16, 2015
Now getting vital first-team experience across the pond, up to three more City prospects were expected to join Facey at NYCFC over the coming weeks, with head coach Jason Kreis revealing last winter that the club were allowed to make four loan signings from the Blues to fill out their roster
That doesn’t look like it will happen during their inaugural campaign, however, as sporting director Claudio Reyna told SBIsoccer last week: “It very likely won’t be four this season. We have one, and I think it just needs to work for all the right reasons.
“There’s a lot of talent there, and we think it’s for us a tool that will help our team here in New York. We’re going to make sure we use it wisely, but to say we use all four will be really difficult right now.
“This is something new that both clubs are working together to make sure it’s a win-win, but right now our squad is filled out. As a bench, we have a bit of flexibility, but we’re probably going to move into the season with Shay being our one Manchester City player.”