An apparatus (200, 300) for guiding a tibial bone cut during knee replacement surgery, the apparatus comprising: a mounting portion (208, 308) configured to couple with an alignment mechanism; and a cutting portion (210, 310) connected to the mounting portion (208, 308) and defining a capture (212, 312) for a proximal cut, the cutting portion (210, 310) having an aperture (220, 320) disposed adjacent a first end of the capture, wherein: the capture (212, 312) terminates prior to the aperture (220, 320); the cutting portion (210, 310) is offset from the mounting portion (208, 308) in at least one of a medial or lateral direction and the capture (212, 312) is configured to define a medial-lateral cut length such that the proximal cut is to a single compartment of a knee; the cutting portion includes a second capture for a sagittal cut; at least a portion of the second capture is defined by one or more projections (230A, B) extending proximally from a proximal surface of the cutting portion and the one or more projections (230A, B) comprise a pair of medial-lateral spaced projections (230A, B) and the second capture comprises three captures comprising: a laterally disposed capture defined by a first surface of a first of the pair of projections; a medially disposed capture defined by a first surface of a second of the pair of projections, and a middle capture defined by a second surface of the first of the pair of projections and defined by a second surface of the second of the pair of projections. a mounting portion (208, 308) configured to couple with an alignment mechanism; and a cutting portion (210, 310) connected to the mounting portion (208, 308) and defining a capture (212, 312) for a proximal cut, the cutting portion (210, 310) having an aperture (220, 320) disposed adjacent a first end of the capture, wherein: the capture (212, 312) terminates prior to the aperture (220, 320); the cutting portion (210, 310) is offset from the mounting portion (208, 308) in at least one of a medial or lateral direction and the capture (212, 312) is configured to define a medial-lateral cut length such that the proximal cut is to a single compartment of a knee; the cutting portion includes a second capture for a sagittal cut; at least a portion of the second capture is defined by one or more projections (230A, B) extending proximally from a proximal surface of the cutting portion and the one or more projections (230A, B) comprise a pair of medial-lateral spaced projections (230A, B) and the second capture comprises three captures comprising: a laterally disposed capture defined by a first surface of a first of the pair of projections; a medially disposed capture defined by a first surface of a second of the pair of projections, and a middle capture defined by a second surface of the first of the pair of projections and defined by a second surface of the second of the pair of projections. a laterally disposed capture defined by a first surface of a first of the pair of projections; a medially disposed capture defined by a first surface of a second of the pair of projections, and a middle capture defined by a second surface of the first of the pair of projections and defined by a second surface of the second of the pair of projections.