Archdiocese of Mobile- Mr. Michael Farmer. Hours: Monday to Friday, 9am to 4pm. (251)-434-1585 PO Box 1966, Mobile, AL 36613. You have to get special permission to see the collection, so I doubt look-ups are possible.
You might also check ADAH (Alabama State Archives) at:www.archives.state.al.us/dataindex.html If you do find that the Sacramental Records are published for St. Mary Church in Mobile, AL, please let me know! Good luck! Jude