The Pennsylvania Railroad's class L2s^[1] was a class of USRA Light Mikados originally purchased (1919) for the subsidiary Grand Rapids and Indiana Railroad. Similar in size to the home-designed and built L1s, the L2s was easily distinguishable by their radial-stay fireboxes and Hodges fabricated trailing trucks. They were built by ALCO. All were retired in 1948.

After World War I, the Pennsylvania Railroad needed a lighter 2-8-2 type steam locomotive to handle lighter freight trains on the system. In 1919, 38 locomotives (GR&I 106-112 and PRR 2006-2038) were purchased while the railroad was under USRA control. Alco, Baldwin, and Lima filled the order. Most were sold in 1923 (2006-2038) to the SLSF (Frisco) and MP (Missouri Pacific). Five were retained to run on the Grand Rapids & Indiana and renumbered in 1921 to PRR 9627-9631. All 5 locomotives 9627 to 9631 remaining with the Pennsy were photographed at some stage, most in the 1930s.^[2]

The five locos remained in service through World War II, until being replaced and dropped from the roster between March and November 1948.^[3] Frisco 4018 (former PRR 20030) is displayed at Birmingham, Al.

LGB produced a USRA Light Mikado from 2001 to 2004 in G scale in multiple fallen flag railroad names including product number 21872, Pennsylvania Railroad No. 2809. In HO scale, Märklin produced both a 2 rail version (TRIX brand)^[4] in 2004 (product ID 22804) and a 3-rail version (product ID 37976)^[5] in 2011. Both of these faithfully replicate the Pennsylvania lettering and paint scheme of the inter-war years.