 Moodys Investors Service Moodys upgraded Martin Midstream Partners L.P.s MMLP Corporate Family Rating CFR to Caa1 from Caa3, Probability of Default Rating PDR to Caa1-PDLD LD appended from Caa3-PD and Speculative Grade Liquidity SGL rating to SGL-3 from SGL-4. Moodys assigned a Caa1 rating to MMLPs senior secured 1.5 lien notes due 2024 and a Caa2 rating to MMLPs senior secured second lien notes due 2025. Moodys upgraded the rating of the remaining senior unsecured notes due 2021 to Caa3 from Ca. 