Jason Collins fell asleep Saturday night without a team. On Sunday, he became the Nets’ most publicized player, the first openly gay athlete to play in an N.B.A. game, although one on a 10-day contract.

On Monday, inquiries by those eager to buy a Nets jersey with Collins’s name started to multiply. On Tuesday, Collins jerseys will go on sale at the N.B.A.’s retail shop in Manhattan and at NBAstore.com.

Collins’s jersey number of choice is 98, in honor of Matthew Shepard, a gay college student from Wyoming who was murdered in 1998. But on Sunday, when the Nets acted quickly to get Collins in uniform for a game against the Los Angeles Lakers, they had to resort to a generic jersey the team travels with in case of emergencies.

As a result, Collins wore No. 46 in the Nets’ 108-102 victory over the Lakers, a game in which he logged 11 minutes, grabbed two rebounds and finished with an impressive plus-8 for his time on the court. On Tuesday, Collins will get to have his first practice with his new teammates. On Wednesday, he will presumably be wearing a No. 98 uniform in Portland against the Trail Blazers.

Vicky Picca, the N.B.A.’s senior vice president for licensing and business affairs, used the word “unprecedented” Monday to describe the inquiries from people interested in buying something with Collins’s name on it. On Tuesday, they can start making purchases, including T-shirts with Collins’s name that will be available only online.

Fans will not yet be able to buy Collins apparel at the Nets Shop by Adidas, the official team store in Barclays Center. Barry Baum, the Nets’ executive vice president and chief communications officer, said that historically, player-specific merchandise was not made available when a player was on a 10-day contract. Baum added that if, and when, a player became signed for the entire season — which could easily happen in Collins’s case — his merchandise would go on sale at the team store and on the team’s website.

Although Adidas supplies both outlets with official merchandise, Picca said it was up to the Nets to decide when they wanted to begin selling certain apparel.