I would trade him next year (re-sign JV, plus Valdez, McCullers, Javier, Urquidy and Brown in the rotation). Not to sound like a hater but I never liked his Cha Cha Cha windup, not his Prior-Strasburg-esque "inverted W" mechanics (which are known to be more stressful on the arm than the classic throwing motion).
Garcia has been shaky for a while but thankfully we won’t need a 5th in the PS if this continues. JV, FV, CJ and JU. If LM Jr is back you can add/subtract as needed and that’s a tight rotation.