A rocker arm for transmitting rotational motion from a camshaft to opening and closing motion of a combustion valve in an internal combustion engine, said rocker arm comprising: an outer arm defining a stop aperture with a stop surface; an inner arm which selectively pivots relative to said outer arm; a latching mechanism which switches said rocker arm between a coupled state in which said inner arm is prevented from pivoting relative to said outer arm past a predetermined position of said inner arm relative to said outer arm in a first direction and a decoupled state in which said inner arm pivots relative to said outer arm past said predetermined position in said first direction; a lost motion spring which biases said inner arm to pivot relative to said outer arm in a second direction which is opposite from said first direction; and a stop pin fixed to said inner arm and extending into said stop aperture such that said stop pin is circumferentially surrounded by said stop surface and such that said stop pin within said stop aperture limits the extent to which said inner arm pivots relative to said outer arm in said second direction, a roller shaft extending along an axis and supported by said inner arm such that said roller shaft pivots with said inner arm relative to said outer arm; and a roller which circumferentially surrounds said roller shaft such that said roller rotates relative to said roller shaft about said axis; wherein said stop pin is fixed to said roller shaft, and, wherein said roller shaft defines a stop pin bore within which said stop pin is received in fixed relationship which prevents movement of said stop pin relative to said roller shaft and, wherein the stop pin bore being not extended entirely through the roller shaft but being a blind bore. an outer arm defining a stop aperture with a stop surface; an inner arm which selectively pivots relative to said outer arm; a latching mechanism which switches said rocker arm between a coupled state in which said inner arm is prevented from pivoting relative to said outer arm past a predetermined position of said inner arm relative to said outer arm in a first direction and a decoupled state in which said inner arm pivots relative to said outer arm past said predetermined position in said first direction; a lost motion spring which biases said inner arm to pivot relative to said outer arm in a second direction which is opposite from said first direction; and a stop pin fixed to said inner arm and extending into said stop aperture such that said stop pin is circumferentially surrounded by said stop surface and such that said stop pin within said stop aperture limits the extent to which said inner arm pivots relative to said outer arm in said second direction, a roller shaft extending along an axis and supported by said inner arm such that said roller shaft pivots with said inner arm relative to said outer arm; and a roller which circumferentially surrounds said roller shaft such that said roller rotates relative to said roller shaft about said axis; wherein said stop pin is fixed to said roller shaft, and, wherein said roller shaft defines a stop pin bore within which said stop pin is received in fixed relationship which prevents movement of said stop pin relative to said roller shaft and, wherein the stop pin bore being not extended entirely through the roller shaft but being a blind bore.