A deepwater managed pressure drilling joint may use existing flow paths to reduce or eliminate the need for certain specialized equipment in the pressurized fluid return path, including the discrete flow diverter, annular closing system, distribution manifold, and/or MPD choke manifold. An integrated subsea choke valve may be disposed underwater that controllably diverts returning fluids from a bottom-side annulus, within a bottom-side housing and below the annular seal, to a top-side annulus, within a top-side housing above the annular seal, for return through the upper portion of the marine riser system for discharge by the rig diverter.
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