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We present stellar rotation rates derived from Transiting Exoplanet SurveySatellite (TESS) light curves for stars in Upper Centaurus-Lupus (UCL; ~136 pc,~16 Myr) and Lower Centaurus-Crux (LCC; ~115 pc, ~17 Myr). We findspot-modulated periods (P) for ~90% of members. The range of light curve andperiodogram shapes echoes that found for other clusters with K2, but fewermulti-period stars may be an indication of different noise characteristics ofTESS, or a result of the source selection methods here. The distribution of Pas a function of color as a proxy for mass fits nicely in between that for botholder and younger clusters observed by K2, with fast rotators found among boththe highest and lowest masses probed here, and a well-organized distribution ofM star rotation rates. About 13% of the stars have an infrared (IR) excess,suggesting a circumstellar disk; this is well-matched to expectations, giventhe age of the stars. There is an obvious pile-up of disked M stars at P~2days, and the pile-up may move to shorter P as the mass decreases. There isalso a strong concentration of disk-free M stars at P~2 days, hinting thatperhaps these stars have recently freed themselves from their disks. Exploringthe rotation rates of stars in UCL/LCC has the potential to help us understandthe beginning of the end of the influence of disks on rotation, and thetimescale on which the star responds to unlocking.

Rotation of Low-Mass Stars in Upper Centaurus Lupus and Lower Centaurus Crux with TESS