GYMNASTICS

USA: The coordinator of the women’s national team for USA Gymnastics has stepped down, the latest departure to rock the embattled organization in the wake of a sexual abuse scandal centered on former team doctor Larry Nassar.

Valeri Liukin said he was stepping down after taking over for Martha Karolyi in September 2016.

Liukin said in a statement that while he wanted to help turn the program around, “the present climate causes me, and more importantly my family, far too much stress, difficulty and uncertainty.”

OLYMPICS

OBIT: Olympic sprinter Cliff Bourland, America’s oldest living gold medalist, has died. He was 97.

He died Thursday of complications from pneumonia in Santa Monica, according to a statement released by USC.

Bourland won gold at the 1948 London Games while running the second leg of the U.S. 1,600-meter relay.

TENNIS

NEW YORK OPEN: Hyeon Chung pulled out of this month’s New York Open because of the blister injury that forced him to retire from his semifinal loss to Roger Federer in the Australian Open.

ST. PETERSBURG LADIES TROPHY: Australian Open champion Caroline Wozniacki lost to Daria Kasatkina 7-6 (2), 6-3 in the quarterfinals at Russia.

SOCCER

MEXICO: U.S. forward Rubio Rubin signed with the Mexican club Tijuana.

Rubin , 21, was with Utrecht in the Netherlands from 2014-17 and split last year between Denmark’s Silkeborg and Norway’s Stabaek.

ARGENTINA: A coach in the lower divisions of Argentine soccer quit after being threatened at gunpoint by a benched player.

Coach Cristian Neira of the Escuela Presidente Roca club, in one of the regional lower divisions in the Cordoba province north of Buenos Aires, quit after midfielder Cesar Pagani pulled a gun during training and demanded to be included in the starting lineup on Thursday, said Emeterio Farias, president of the Cordoba Soccer League.

MLS: The New York Red Bulls signed Venezuelan midfielder Cristian Casseres Jr.