He tweeted Wednesday that he "stands with" Andrew Wiggins and the league's other unvaccinated players.
Senator Cruz himself is vaccinated.
In the same Twitter thread, he called out Lebron James to boycott any games played in arenas that ban unvaccinated players, which would include San Francisco's Chase Center.
Earlier this week, Warriors forward Andrew Wiggins declined to discuss whether he remains unvaccinated, but it certainly sounded like that was the case.
Wiggins said during the team's media day Monday that he will continue to stand by his beliefs when it comes to not receiving a coronavirus vaccine.
"Back is definitely against the wall, but I'm just going to keep fighting for what I believe," Wiggins said. "I'm going to keep fighting for what I believe is right. What's right to one person isn't right to the other and vice versa."
RELATED: Warriors Andrew Wiggins says he will stick to beliefs regarding vaccine
Wiggins declined to explain what those beliefs actually entail, saying, "It's none of your business, that's what it comes down to."
He faces the possibility of not being allowed into Golden State's home building at Chase Center for games come Oct. 13 when the San Francisco Department of Public Health begins requiring proof of vaccination for large indoor events.
The Associated Press contributed to this report.