https://www.uscis.gov/sites/default/files/document/forms/i-485instr.pdf
인스터럭션 보니, 페이지 3에 아래와 같이 적혀있네요. 세번째 조건을 보면, 가능한듯 싶네요.
If you are or were a J-1 or J-2 nonimmigrant exchange visitor and are subject to the 2-year foreign residence requirement of INA section 212(e), you may not apply to adjust status unless you have complied with the foreign residence requirement, have been granted a waiver of that requirement, or were issued a favorable waiver recommendation letter from U.S. Department of State (DOS).