ST. PETERSBURG — Rays right-hander Yonny Chirinos was placed on the 10-day injured list Thursday due to triceps inflammation.Chirinos was slated to start one of the seven-inning games in the Saturday doubleheader against the Yankees. The Rays recalled Trevor Richards, who will be available to work multiple innings, either as a starter or behind an opener.Tyler Glasnow is slated to start the other game; the Rays have not set the order. With the shortened games, and the benefit of adding another pitcher as the extra “29th man” for the doubleheader, the Rays might not need an actual second starter Saturday. They will have an open spot in the rotation again Tuesday in Boston, needing to add a starter,or go with an opener/bullpen day arrangement.Chirinos missed the first 16 days of Spring 2.0 workouts after testing positive for COVID-19 in late June following his participation in the informal sessions at Tropicana Field. He joined the team on the field on July 19 and was deemed ready to start the season after throwing in a simulated game on July 23. He made two starts, throwing 68 pitches over four innings July 28 and 72 pitches over 4⅔ on Sunday, allowing one earned run. The injured list move was backdated to Monday, and his stay is expected to be short.Richards was optioned to the alternate training on Tuesday, having pitched in two games, allowing six runs and 10 hits over 5⅓ innings. Brendan McKay, who resumed workouts last week after his own case of COVID-19, is not yet ready to be in the mix for a callup.